Raypak 106, User'S Installation And Operation Manual

13

4.7.3.  Electronic Ignition Gas Valves

Figure 11.  Location of Gas Pressure Adjustment

4.7.4.  Water Connections

The 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.

Plumbing from the heater back to the pool or spa must not 

have any valves or restriction that could prevent flow when 

the pump is operating.
Heater  must  be  located  so  that  any  water  leaks  will  not 

damage the structure of adjacent area. PVC pipe may be 

glued directly into supplied CPVC header unions.

Model

Tubing

Input

1/2" (1.27 cm)

3/4" (1.91 cm)

1" (2.54 cm)

NAT

LPG

NAT

LPG

NAT

LPG

106

Cu

105,000 BTU/hr

(30.8 kW)

26' (8 m)

65' (20 m)

99' (30 m)

252' (77 m) 350' (107 m) 892' (272 m)

156

Cu

150,000 BTU/hr

(43.9 kW)

13' (4 m)

34' (10 m)

51' (16 m)

130' (40 m)

180' (55 m) 459' (140 m)

Table capacities are based upon use of sch 40 black iron pipe. For capacities using other materials, consult local code. 

* Natural Gas 1000 BTU/FT

3

 0.60 Specific Gravity @ 0.5" WC Pressure Drop (Gaz Naturel 3154.5 W/m

3

 0.60 Densite @ 0.124 kPa Pressure Drop) 

* Natural Gas 2500 BTU/FT

3

 1.53 Specific Gravity @ 0.5" WC Pressure Drop (Gaz Naturel 7886.3 W/m

3

 0.60 Densite @ 0.124 kPa Pressure Drop)

Table I. 

Maximum Equivalent Pipe Length

4.7.5.  Flow Rates

Model

Minimum

Maximum

106/156

20 GPM (75 L)

70 GPM (265 L)

Table H.  Water Flow Rates

When  the  flow  rates  exceed  the  maximum  70  GPM 

(265 L), an external auxiliary bypass valve is required. See 

section  "External  Auxiliary  Bypass  Valve"  on  page 14 

for details.

4.7.6.  Polymer Headers

Before attaching the supplied 2" (5 cm) CPVC unions to 

the  In/Out  header,  make  sure  the  O-rings  are  properly 

seated in the grooves. Use AquaLube or equivalent non-

petroleum-based lubricant on the O-ring. Hand tighten the 

unions. Glue PVC or CPVC piping directly to the unions.

In/Out Header

O-Ring

Tail Piece

Nut

2” Pipe

(5cm)

Drain Plug

Figure 12.  In/Out Header for 2" (5 cm) Installation

In/Out Header

Hose Connector

Hose

Figure 13. 

Optional In/Out Header for 1-1/2" (3.8 cm) 

or 

1-1/4" (3.2 cm) Hose Connection

If  there  is  any  possibility  of  back-siphoning  when  the 

pump  stops,  it  is  recommended  that  a  check  valve  (or 

valves) also be installed in the system.