Aqua Products RP2100 - Manual (Page 15)

Fig. # 8149
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 to
increase pressure or counter-clockwise to
decrease pressure.
PIPE SIZING FOR GAS CONNECTIONS
Low NOx units are not available in propane.
PLUMBING FOR WATER CONNECTIONS
LOCATION
The RP 2100 heater requires water flow and positive
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
discharge side of the filter pump;
2. The outlet side of the filter is then plumbed to the inlet
of the heater; and
3. The outlet of the heater is plumbed to the return line
to the pool or spa. The pump, filter and heater are
thus plumbed in series.
15
Gas
Pressure
Adjustment
GAS PRESSURE ADJUSTMENT LOCATIONS
MILLIVOLT GAS VALVES
ELECTRONIC IGNITION GAS VALVES
Robertshaw 7000
Models 185 thru 405
Gas
Pressure
Adjustment
Honeywell VR8304
Models 185 thru 405
Robertshaw 7200
Model 185
ELECTRONIC IGNITION GAS VALVES-CONTINUED
Robertshaw 7000 BDER
Model 265-335
Robertshaw 7000 DERHC
Model 405
Gas
Pressure
Adjustment
Gas
Pressure
Adjustment
Fig # 9263
Fig # 9264
Fig # 9328
Fig # 9327
Fig # 9329
Fig. # 9365
ATMOSHPERIC LOW NOx