Modine Manufacturing GAS-FIRED HEATERS PD 사용자 설명서
27
CONTROL OPTIONS
Propeller and Blower Unit Heaters – PD and BD Models ➀ ➁ ➂ ➃
Single-Stage, Standing Pilot, 100% Shut-Off – Utilizes a single-stage combination gas control and
thermocouple. Pilot needs to be manually lit initially and stays lit.
thermocouple. Pilot needs to be manually lit initially and stays lit.
Two-Stage, Standing Pilot, 100% Shut-Off – Utilizes a two-stage gas control (which fires at 50% or 100% of
full rated input) and thermocouple. Pilot needs to be manually lit initially and stays lit.
full rated input) and thermocouple. Pilot needs to be manually lit initially and stays lit.
Single-Stage, Intermittent Pilot Ignition, 100% Shut-Off with Continuous Retry – Utilizes a single-stage
combination gas control and an ignition control (continuous retry). Pilot is automatically lit on call for heat.
combination gas control and an ignition control (continuous retry). Pilot is automatically lit on call for heat.
Mechanical Modulation with Automatic Pilot Ignition, 100% Shut-Off with Continuous Retry – Utilizes a
modulating combination gas control and an ignition control (continuous retry). Pilot is automatically lit whenever
there is power to the unit. Modulation range is between 50% and 100% fire; gas control shuts off below 50%
fire. Available on BD models only.
Two-Stage, Intermittent Pilot Ignition, 100% Shut-Off with Continuous Retry – Utilizes a two-stage combination
gas control (which fires at 50% or 100% of full rated input) and an ignition control (continuous retry). Pilot is
automatically lit only on call for heat.
modulating combination gas control and an ignition control (continuous retry). Pilot is automatically lit whenever
there is power to the unit. Modulation range is between 50% and 100% fire; gas control shuts off below 50%
fire. Available on BD models only.
Two-Stage, Intermittent Pilot Ignition, 100% Shut-Off with Continuous Retry – Utilizes a two-stage combination
gas control (which fires at 50% or 100% of full rated input) and an ignition control (continuous retry). Pilot is
automatically lit only on call for heat.
11
12
13
14
81
82
91
92
12
13
14
81
82
91
92
25
26
83
84
26
83
84
30
31
32
33
85
86
93
94
31
32
33
85
86
93
94
59
60
89
90
60
89
90
63
64
87
88
64
87
88
115V
200/230V
460V
575V
115V
575V
115V
200/230V
460V
575V
575V
115V
200/230V
115V
200/230V
115V
200/230V
460V
575V
115V
575V
115V
200/230V
460V
575V
575V
115V
200/230V
115V
200/230V
115V
200/230V
115V
200/230V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
25V
natural
natural
natural
natural
natural
natural
natural
propane
propane
propane
propane
propane
propane
propane
natural
natural
natural
propane
propane
propane
natural
natural
natural
natural
natural
natural
natural
propane
propane
propane
propane
propane
propane
propane
natural
natural
natural
propane
propane
propane
natural
natural
natural
propane
propane
propane
Control System Description
Control
Code No.
Service Voltage
Thermostat
Voltage
Type of
Gas
➀
CGA approved 460V and 575V available on blower units only.
➁
All PD and BD models with two-stage or modulating gas controls require a Category II vent system.
➂
For units with control systems having fan timer, fan starts 30 seconds (max.) after ignition and shuts down approximately 60 seconds after main burner shuts down. Available on units with up to 1 hp
motors or 14 amps @ 115V A.C. Contact factory for applications with units having motors with horsepower ratings above 1 hp or 14 amps @ 115V A.C.
motors or 14 amps @ 115V A.C. Contact factory for applications with units having motors with horsepower ratings above 1 hp or 14 amps @ 115V A.C.
➃
Whenever 200V/1φ, 230V/1φ, 200V3φ, or 230V/3φ is used, it is necessary to specify 200V/230V controls. Whenever 460V (or 575V) 3φ power is used, it is necessary to choose between 200V/230V
or 460V (or 575V) controls. The 200V/230V controls will require the installer to provide a 460V (or 575V) to 230V (or 200V), 75VA step-down transformer [if the power exhauster accessory is used,
the step-down transformer needs to be 250VA] with the motor starter coil voltage being 230V (or 200V). The 460V (or 575V) controls require no additional transformer (unless the power exhauster
accessory is used, then a 460V (or 575V) to 230V, 250VA step-down transformer is needed) with the motor starter coil voltage 24V.
or 460V (or 575V) controls. The 200V/230V controls will require the installer to provide a 460V (or 575V) to 230V (or 200V), 75VA step-down transformer [if the power exhauster accessory is used,
the step-down transformer needs to be 250VA] with the motor starter coil voltage being 230V (or 200V). The 460V (or 575V) controls require no additional transformer (unless the power exhauster
accessory is used, then a 460V (or 575V) to 230V, 250VA step-down transformer is needed) with the motor starter coil voltage 24V.
Control Operating Sequence
For Standing Pilot (with Pilot Lit)
Upon a call for heat from thermostat, power is supplied to the
combination gas control and at the same time power is supplied to the
fan timer. The main burner should light immediately. The fan motor will
start in 15 to 45 seconds.
combination gas control and at the same time power is supplied to the
fan timer. The main burner should light immediately. The fan motor will
start in 15 to 45 seconds.
When the thermostat has been satisfied, power is turned off to the
combination gas control and fan timer. The main burner will go out but
the pilot will continue to burn. The fan motor will continue to operate for
45 to 75 seconds to allow the heat exchanger to cool down.
combination gas control and fan timer. The main burner will go out but
the pilot will continue to burn. The fan motor will continue to operate for
45 to 75 seconds to allow the heat exchanger to cool down.
For Intermittent Pilot
Upon a call for heat from the thermostat, power is supplied to the
ignition control and at the same time power is supplied to the fan timer.
Sparking will start at the pilot immediately and at the same time the first
operator of the combination gas control opens to allow gas to flow to
the pilot burner. The pilot flame should light and be sensed (proven) in a
few seconds. As soon as the pilot flame is sensed the sparking will stop
and the second operator of the combination gas control will open
allowing gas to flow to the main burner. In 15 to 45 seconds from the
time the thermostat called for heat the fan motor will start.
ignition control and at the same time power is supplied to the fan timer.
Sparking will start at the pilot immediately and at the same time the first
operator of the combination gas control opens to allow gas to flow to
the pilot burner. The pilot flame should light and be sensed (proven) in a
few seconds. As soon as the pilot flame is sensed the sparking will stop
and the second operator of the combination gas control will open
allowing gas to flow to the main burner. In 15 to 45 seconds from the
time the thermostat called for heat the fan motor will start.
On systems utilizing control codes 30-33, 85, 86, 93 or 94, the system
will attempt to light the pilot for 70 seconds once there is a demand for
heat. If the pilot is not sensed for any reason, the ignition control will
will attempt to light the pilot for 70 seconds once there is a demand for
heat. If the pilot is not sensed for any reason, the ignition control will
wait for a predetermined time with the combination gas control closed
and no spark. After the predetermined time lapses, the cycle will begin
again. The time that lapses between cycles is at pre-programmed
intervals (approximately 6 minutes). This will continue indefinitely until
the pilot flame is sensed or until power is interrupted to the system.
and no spark. After the predetermined time lapses, the cycle will begin
again. The time that lapses between cycles is at pre-programmed
intervals (approximately 6 minutes). This will continue indefinitely until
the pilot flame is sensed or until power is interrupted to the system.
When the thermostat has been satisfied, power is turned off to the
ignition control and the combination gas control, so both the main gas
and pilot gas are turned off. The fan will continue to operate for 45 to 75
seconds to allow the heat exchanger to cool down.
ignition control and the combination gas control, so both the main gas
and pilot gas are turned off. The fan will continue to operate for 45 to 75
seconds to allow the heat exchanger to cool down.
Two-Stage Control Systems
The thermostat will start the unit with the combination gas control in the
first stage (50% of normal input). If the thermostat senses a further drop
in temperature the second stage (100% of normal input) of the
combination gas control will be energized. When the thermostat senses
an increase in temperature the combination gas control will be returned
to the first stage operation.
first stage (50% of normal input). If the thermostat senses a further drop
in temperature the second stage (100% of normal input) of the
combination gas control will be energized. When the thermostat senses
an increase in temperature the combination gas control will be returned
to the first stage operation.
Mechanical Modulation Systems
When power is turned on the pilot is automatically lit. When the sensing
bulb attached to the combination gas control senses a drop in
temperature the valve will open at 50% of normal input. If the
temperature drops further the valve will open further. As the
temperature rises the valve will return to 50% of normal input. If the
temperature rises further the valve will close.
bulb attached to the combination gas control senses a drop in
temperature the valve will open at 50% of normal input. If the
temperature drops further the valve will open further. As the
temperature rises the valve will return to 50% of normal input. If the
temperature rises further the valve will close.
Optional Controls required by others
Supply
Transformer
Transformer
Control
Transformer
Motor Starter
Voltage
by Modine
by Others
Voltage
Gravity Vented
Power Exhausted
Coil Voltage
115V
X
115V
–
–
–
200V
X
200/230V
–
–
200V
230V
X
200/230V
–
–
230V
460V
X
460V
–
460V/230V,250VA
24V
X
200/230V
460V/230V,75VA ➀
460V/230V,250VA
230V ➀
575V
X
575V
–
575V/230V,250VA
24V
X
200/230V
575V/230V,75VA ➀
575V/230V,250VA
230V ➀
Electrical Details
➀
460V(575V)/200V transformer as an alternative is okay. Motor starter coil then needs to be 200V also.