26
Electrical Power Connections
Installations must follow these codes:
•
National Electrical Code and any other national,
state, provincial or local codes or regulations hav-
ing jurisdiction.
•
Safety wiring must be NEC Class 1.
•
Heater must be electrically grounded as required
by the NEC.
•
In Canada, CSA C22. 1 C.E.C. Part 1.
The heater is wired for 120 VAC, less than 12 amps in
its basic configuration. Additional options may
increase the amp draw of the unit. The voltage is indi-
cated on the tie-in leads. Consult the wiring diagram
Fig. 28: Gas Valves
Table J: Maximum Equivalent Pipe Length
Natural gas – 1,000 BTU per ft
3
, .60 specific gravity at 0.5 in. WC pressure drop
Propane gas (HD-5) – 2,500 BTU per ft
3
, 1.53 specific gravity at 0.6 in. WC pressure drop
Gas Supply Pressure
A minimum of 5.6 in. WC upstream gas pressure
under full load and a maximum gas supply pressure
set point of 10.5 in. WC under load and no-load condi-
tions are required for natural gas. A minimum of 11.0
in. WC upstream gas pressure under full load and a
maximum gas supply pressure set point of 13.0 in. WC
are required for propane gas. The gas pressure regu-
lator(s) supplied on the heater is for low-pressure
service. If upstream pressure exceeds 14.0 in. WC
(1/2 psi)
at any time
, an intermediate gas pressure
regulator, of the lockup type, must be installed.
When connecting additional gas utilization equipment
to the gas piping system, the existing piping must be
checked to determine if it has adequate capacity for
the combined load.
The gas valve pressure regulator(s) on the heater are
nominally preset at 3.5 in. WC for natural gas, and
10.5 in. WC for propane gas on heater models 302
thru 902. 9.0 in. WC for propane gas on heater models
992 thru 2342. The pressure at the gas valve outlet
tap, measured with a manometer, while in operation
should be 3.5 ± 0.1 in. WC for natural gas and 10.5 in.
± 0.1 in. WC for propane gas on heater models 302
thru 902. 9.0 to 9.5 in. WC for propane gas on heater
models 992 thru 2342. If an adjustment is needed,
remove the adjustment screw cover and turn the
adjustment screw clockwise to increase pressure or
counter-clockwise to lower pressure.
Model
No.
2”
2-1/2”
3”
4”
N
P
N
P
N
P
N
P
992C
120
300
300
1262C
75
180
170
325
560
1532C
50
120
125
250
400
1802C
40
100
100
225
340
2002C
30
80
75
175
260
2072C
30
80
75
175
260
2342C
20
55
55
135
160
400
600
NOTE:
The maximum allowable pressure drop from
static to dynamic at full fire is 30%.
Summary of Contents for Raypak Hi Delta 1262C
Page 54: ...54 Wiring Diagram Models 992C 1262C...
Page 55: ...55 Wiring Diagram Models 1532C 2342C...
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