Modine Manufacturing GAS-FIRED HEATERS PD 사용자 설명서
6
Wiring
All field installed wiring must be done in accordance with the
National Electrical Code ANSI/NFPA 70 – Latest Edition or
Canadian Electrical Code CSA C22.1 Part 1 or local codes.
Unit must be electrically grounded according to these codes.
See wiring diagram shipped with unit.
National Electrical Code ANSI/NFPA 70 – Latest Edition or
Canadian Electrical Code CSA C22.1 Part 1 or local codes.
Unit must be electrically grounded according to these codes.
See wiring diagram shipped with unit.
The power to these unit heaters should be protected with a
circuit breaker. Units for use with single-phase electric power,
should be provided with a manual motor starter, having
properly sized overload protection. Units for use with three-
phase electric power must be provided with a motor starter
having properly sized overload protection.
circuit breaker. Units for use with single-phase electric power,
should be provided with a manual motor starter, having
properly sized overload protection. Units for use with three-
phase electric power must be provided with a motor starter
having properly sized overload protection.
Location of thermostat should be determined by heating
requirements and be mounted on an inside wall about 5' above
floor level where it will not be affected by heat from the unit or
other sources, or drafts from frequently opened doors. See
instructions packed with thermostat.
requirements and be mounted on an inside wall about 5' above
floor level where it will not be affected by heat from the unit or
other sources, or drafts from frequently opened doors. See
instructions packed with thermostat.
Installation of Blower Models (BD UNITS)
Attachment of Field Installed Ductwork, Blower
(BD) Models Only
(BD) Models Only
Burned-out heat exchanger as well as shorter equipment life
will result from not providing uniform air distribution.
will result from not providing uniform air distribution.
When installing heater always follow good duct design practices
for even distribution of the air across the heat exchanger.
Recommended layouts are shown below. When installing
blower units with ductwork the following must be done.
Recommended layouts are shown below. When installing
blower units with ductwork the following must be done.
1. Provide uniform air distribution over the heat
exchanger.
Use turning vanes where required. See figures below.
2. Provide removable access panels in the ductwork on the
downstream side of the unit heater. These openings should
be large enough to view smoke or reflect light inside the
casing to indicate leaks in the heat exchanger and to check
for hot spots on exchanger due to poor air distribution or
lack of sufficient air.
be large enough to view smoke or reflect light inside the
casing to indicate leaks in the heat exchanger and to check
for hot spots on exchanger due to poor air distribution or
lack of sufficient air.
3. If ductwork is connected to the rear of the unit use Modine
blower enclosure kit or if using field designed enclosure
maintain dimensions of blower enclosure as shown on page 13.
maintain dimensions of blower enclosure as shown on page 13.
INSTALLATION
CAUTION
Disconnect power supply before making wiring connections
to prevent electrical shock and equipment damage. ALL
UNITS MUST BE WIRED STRICTLY IN ACCORDANCE
WITH WIRING DIAGRAM FURNISHED WITH UNIT.
to prevent electrical shock and equipment damage. ALL
UNITS MUST BE WIRED STRICTLY IN ACCORDANCE
WITH WIRING DIAGRAM FURNISHED WITH UNIT.
ANY WIRING DIFFERENT FROM WIRING DIAGRAM MAY
BE HAZARDOUS TO PERSONS AND PROPERTY.
BE HAZARDOUS TO PERSONS AND PROPERTY.
Any damage to or failure of Modine units caused by incorrect
wiring of the units is not covered by MODINE’S STANDARD
WARRANTY (see Back Cover).
wiring of the units is not covered by MODINE’S STANDARD
WARRANTY (see Back Cover).
CAUTION
Proper air flow and distribution, across the heat exchanger
must be provided to prevent early failure of the blower unit
heater.
must be provided to prevent early failure of the blower unit
heater.
CAUTION
Do not attempt to attach ductwork of any kind to propeller PD
models.
models.
CAUTION
Check for red heat exchanger tubes. If bottom of tubes
become red while blower unit is in operation, check for
proper air volume and air distribution. Adjust blower speed or
correct discharge duct design to correct problem.
become red while blower unit is in operation, check for
proper air volume and air distribution. Adjust blower speed or
correct discharge duct design to correct problem.
1/2
3/4
1
1 1/4
1 1/2
2
3
4
6
8
15
76
218
440
750
1220
2480
6500
13880
38700
79000
30
73
152
285
590
890
1650
4700
9700
27370
55850
45
44
124
260
435
700
1475
3900
7900
23350
45600
60
50
105
190
400
610
1150
3250
6800
19330
39500
75
97
200
345
545
1120
3000
6000
17310
35300
90
88
160
320
490
930
2600
5400
15800
32250
105
80
168
285
450
920
2450
5100
14620
29850
120
158
270
420
860
2300
4800
13680
27920
150
120
242
380
710
2000
4100
12240
25000
180
128
225
350
720
1950
4000
11160
22800
210
205
320
660
1780
3700
10330
21100
240
190
300
620
1680
3490
9600
19740
270
178
285
580
1580
3250
9000
18610
300
170
270
545
1490
3000
8500
17660
450
140
226
450
1230
2500
7000
14420
600
119
192
380
1030
2130
6000
12480
Table 3
Gas Pipe Capacities
Gas Pipe Capacities
In Cu. Ft. per Hour with Pressure Drop pf 0.3 in. W.C. with Specific Gravity 0.60.
Diameter of Pipe - Inches
Length of
Pipe in Ft.