Instructions / Assembly

32
For millivolt heaters, the reman's switch connection is
a wire nut located in the Violet/Black wiring between the
manual toggle switch and the gas valve. heaters, splice
into the red/white wire to connect the time clock.
For digital heaters, the reman’s switch connection is
located on the 14-pin header connected to the digital
control board. Splice into the red wire jumper tagged –
Where necessary add “Fireman’s” switch circuit here – to
connect the time clock.
The reman’s switch connection on both millivolt and
digital heaters must be a dry contact and must not
supply power to the heater. Powering the reman’s
switch connection externally may damage the heater,
and is not covered by warranty.
Millivolt heaters: Do not exceed 15 ft (4.5 m) of total wiring
using 14 AWG stranded copper wire rated for 105°C
minimum.
Digital heaters: Do not exceed 50 ft (15 m) of total wiring
using 18 AWG stranded copper wire rated for 105°C
minimum.
NOTE: When using a time clock, the digital heater will
display “Clock/Fireman Sw” when the reman’s switch
is open, indicating that the time clock has shut o󰀨 the
call for heat.
Water Pressure Switch
The water ow switch ensures that the heater operates
only when the lter pump is in operation. It is located on the
In/Out header. It is factory-set at 1.75 PSI for deck-level
installations.
Water Pressure Switch Adjustment
When the heater is located below the level of the spa or
pool, it may be necessary to adjust the presssure switch to
compensate for the no-ow static head. If it is necessary
to adjust the water pressure switch, utilize the following
procedure:
1. Make sure the pool filter is clean before adjusting the
switch.
2. Set the heater control to the OFF mode.
3. Turn the filter pump ON and confirm that the pressure
switch is closed (use a multimeter to check). If the
pressure switch fails to close, either the switch setting
is too high or not enough pressure is being supplied
by the filter pump.
4. Turn the heater ON.
5. Manually turn the pressure adjustment knob clockwise
until the heater shuts off. (A flat screwdriver may be
necessary if knob is too tight.)
6. Slowly turn the adjustment knob counter-clockwise
until the heater calls for heat again.
7. Turn an additional 1/2 turn counter-clockwise.
8. While the heater is running, check the adjustment
by turning the pump off and on several times. The
burners should shut off immediately when the pump
is turned off. If it does not, repeat the above steps
until proper operation is observed.
F10671
Figure 56. Water Pressure Switch Assembly
NOTE:
The sheet metal access panel should be in place
at all times to protect the water pressure switch from
rain and other environmental factors.
MAY REQUIRE ADJUSTMENT
FOR HIGHER PRESSURE
MAY REQUIRE ADJUSTMENT
FOR LOWER PRESSURE
5 ft. (1.52 m) MAX
POOL OR SPA
5 ft. (1.52 m) MAX
Figure 57. Pressure Switch Adjustment Requirements
NOTE:
If heater is installed outside of the limits shown,
a switch rated for a higher pressure (11 psi / 76 kPa) may
be used. A ow switch, mounted and wired adjacent to
the heater, may be used in place of the factory-mounted
pressure switch. See "ILLUSTRATED PARTS LIST" on
page 45 for 11 psi / 76 kPa water pressure switch.
Two-Speed Pumps
In some cases, the ow on the low-speed is insu󰀩cient
to operate the heater. This is apparent when the water
pressure switch cannot be further adjusted or if the heater
makes banging noises or shuts o󰀨 on high limit. In these
cases, the pump must be run at high speed when heating
the water.