Инструкции По Установке для White Rodgers 21V51U-843 Universal Two-stage HSI Integrated Furnace Control Kit

2

(All times are in seconds, unless noted otherwise)

Pre-purge Time

The period of time intended to allow for the dissipation of any unburned 
gas or residual products of combustion at the beginning of a furnace 
operating cycle prior to initiating ignition

15

Igniter Warm-up Time

The length of time allowed for the igniter to heat up prior to the initiation 
of gas flow.

17

Trial for Ignition Period (TFI)

The period of time between initiation of gas flow and the action to 
shut off the gas flow in the event of failure to establish proof of the 
supervised ignition source or the supervised main burner flame.

4

Ignition Activation Period (IAP)

The period of time between energizing the main gas valve and 
deactivation of the ignition means prior to the end of TFI

3

Retries

The additional attempts within the same thermostat cycle for ignition 
when the supervised main burner flame is not proven within the first 
trial for ignition period.

2 times

Valve Sequence period

Valve sequence period equals 4 seconds trial for ignition period x (1 
initial try + 2 retries) + 12 seconds.

12

Inter-purge

The period of time intended to allow for the dissipation of any unburned 
gas or residual products of combustion between the failed trial for 
ignition and the retry period.

60

Post-purge Time

The period of time intended to allow for the dissipation of any unburned 
gas or residual products of combustion at the end of a furnace burner 
operating cycle. Post-purge begins at the loss of flame sense.

15

Lock-Out Time

ANSI standard rated module timing.

300

Heat Delay-To-Fan-On

The period of time between proof of the supervised main burner flame 
and the activation of the blower motor at Heat speed.

45

Heat Delay-To-Fan-Off*

The period of time between the loss of a call for heat and the 
deactivation of the blower motor at Heat speed.

90/120/150/180

Cool Delay-To-Fan-On

The period of time after a thermostat demand for cool before 
energizing the circulator blower motor at Cool speed.

5

Cool Delay-To-Fan-Off

The period of time between the loss of a call for cool and the 
deactivation of the blower motor at Cool speed.

60

Automatic Reset Time

After one (1) hour of internal or external lockout, the control will 
automatically reset itself and go into an auto restart purge for 60 
seconds.

60 minutes

*These times will vary depending on option switch position.

ELECTRICAL RATINGS [@ 77°F (25°C)]:
Input Voltage: 25 VAC, 60 Hz (Class II transformer required)
Max. Input Current @ 25 VAC: 500mA + MV
Relay Load Ratings:

Gas Valve Relays: 1.5 amps @ 25 VAC, 60 Hz
Inducer Relays: 2.2 FLA - 3.5 LRA @120 VAC
Ignitor Relay: 4.0 amps @ 120 VAC (Resistive)
Humidifier/EAC: 120 VAC/1 Amp

Minimum current to insure flame detection:  0.3 µa DC*
Maximum current for non-detection: 0.1 µa DC*
Maximum allowable leakage resistance: 100 M ohms

*Measured with a DC microammeter in the flame probe lead

OPERATING TEMPERATURE RANGE: 

-40° to 175°F (-40° to 80°C)

HUMIDITY RANGE: 

5% to 93% relative humidity (non-condensing)

Timing Specs: (@ 60 Hz)
 

  

Flame Establishing Time: 

0.8 sec

Flame Failure Response Time: 

2.0 secs

Gases Approved: Natural, Manufactured, Mixed, Liquefied Pe-

troleum, and LP Gas Air Mixtures are all approved for use.