Electrical Power Connections - Rheem Raypak Hi Delta H Series Installation & Operating Instructions Manual

Model
No.
992C
1262C
1532C
1802C
2002C
2072C
2342C
Natural gas – 1,000 BTU per ft
Propane gas (HD-5) – 2,500 BTU per ft
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.
NOTE: The maximum allowable pressure drop from
static to dynamic at full fire is 30%.
2" 2-1/2"
N P N
120 300 300
75 180 170
50 120 125
40 100 100
30 80 75
30 80 75
20 55 55
3 , .60 specific gravity at 0.5 in. WC pressure drop
3 , 1.53 specific gravity at 0.6 in. WC pressure drop
Table J: Maximum Equivalent Pipe Length
3"
P N P
325 560
250 400
225 340
175 260
175 260
135 160 400
Fig. 28: Gas Valves

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
26
4"
N P
600