Time Clock/Fireman's Switch; Water Flow Switch; Flame Roll-Out Safety Switch; High Limits - Raypak 268 Installation & Operating Instructions Manual

TIME CLOCK/FIREMAN'S SWITCH

To operate the heater with a time clock, connect the
timer to the fireman's switch connection in the heater's
wiring. The time clock should be of the dual switch
type and set to shut off the call for heat to the pool
heater 15 to 20 minutes prior to shutting down the pool
pump. The fireman'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 con-
nect the time clock. The fireman's switch connec-
tion must be a dry contact and must not supply
power to the heater.
switch connection externally may damage the
heater, and is not covered by warranty.
Do not exceed 50ft of total wiring using 18 AWG
stranded copper wire rated for 105ºC (221ºF) mini-
mum.
NOTE: When using a time clock, the heater will dis-
play "Clock/ Fireman Sw" when the fireman's switch
is open, indicating that the time clock has shut off the
call for heat.

WATER FLOW SWITCH

The water flow switch ensures that the heater operates
only when the filter pump is in operation. It is located
on the outlet side of the In/Out header. It is factory
pre-wired and pre-set with a minimum water flow pad-
dle. Install conduit to the upper jacket hole. Connect
two wires from the conduit to the appropriate terminal
wires behind the transformer cover (i.e. orange to
orange and orange/black to orange/black). No further
adjustment is needed.
CAUTION: Do not operate the heater without the
function of a properly adjusted flow switch.
Powering the fireman's

FLAME ROLL-OUT SAFETY SWITCH

The heater is equipped with a thermal cutoff device to
prevent flame roll-out in the event the heat exchanger
becomes blocked. This is a "single-use" type fusible
link or thermal fuse, that must be replaced when dis-
abled by an over-temperature condition, caused by
excessive restriction in the heat exchanger flue pas-
sage.

HIGH LIMITS

The heater is equipped with two automatic high limits.
One is located in the inlet/outlet header, and the other
is located in the return header. Both are set to open at
135°F.
NOTE: An erratic high limit is often characteristic of an
internal heat exchanger problem, e.g. scale build-up,
defective bypass. Refer to Troubleshooting section (on
page 36).
HIGH LIMIT REMOVAL
1. Shut off main electrical power switch to heater.
2. Remove inlet/outlet and/or return inspection
panel.
3. Remove defective high limit and replace with a
new high limit.
4. Replace inspection panel.
32