Plumbing For Water Connections - Raypak P-R185A to P-R405A, C-R185A to P-R405A, P-R185AL to P-R405AL, C-R185AL to C-R405AL, RP2100 Installation And Operating Instructions Manual

NOTE: Do not use teflon tape on gas line pipe thread. A
flexible sealant is recommended.
A minimum of 7" W.C. and a maximum of 14" W.C.
upstream pressure under load, and no load conditions
must be provided for natural gas or a minimum of 12"
W.C. and a maximum of 14" for propane gas.
GAS PRESSURE REGULATOR
The gas pressure regulator is preset at 4" W. C. for
natural gas, and 11" W. C. for propane gas. The pressure
at the gas valve, taken with a manometer, should be about
3.7" W. C. natural gas (3.9" W.C. for Low NOx) and 10.5"
W. C. propane gas. If an adjustment is needed, remove
seal and turn adjustment screw clockwise
increase pressure or counter-clockwise
decrease pressure.
Fig. # 8149
ATMOSHPERIC
GAS PRESSURE ADJUSTMENT LOCATIONS
MILLIVOLT GAS VALVES
Robertshaw 7000
Models 185 thru 405
ELECTRONIC IGNITION GAS VALVES
Gas
Pressure
Adjustment
Honeywell VR8304
Models 185 thru 405
ELECTRONIC IGNITION GAS VALVES-CONTINUED
Fig # 9328
to
to
PIPE SIZING FOR GAS CONNECTIONS
Fig. # 9365
LOW NOx
Low NOx units are not available in propane.
Gas
Pressure

PLUMBING FOR WATER CONNECTIONS

Adjustment
LOCATION
Fig # 9263
pressure to fire and operate properly. It must therefore
be installed downstream of the discharge side of the filter
pump. A typical installation is plumbed as follows:
1. The inlet side of the filter is plumbed directly to the
2. The outlet side of the filter is then plumbed to the inlet
3. The outlet of the heater is plumbed to the return line
Fig # 9264
15
Gas
Pressure
Adjustment
Robertshaw 7200
Model 185
Fig # 9327
Robertshaw 7000 DERHC
Model 405
The RP 2100 heater requires water flow and positive
discharge side of the filter pump;
of the heater; and
to the pool or spa. The pump, filter and heater are
thus plumbed in series.
Fig # 9329
Robertshaw 7000 BDER
Model 265-335
Gas
Pressure
Adjustment