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INTRODUCTION
The Spa-Pak spa Heaters have been designed to pro-
vide efficient, pollution-free, electric pool heating while
requiring minimal installation. The Spa-Pak consists of
a sheathed resistance element installed in a copper
tank.
This tank has a 1-1/2" inlet and outlet on the side for
plumbing connections. The heater voltage is 208/240V
single-phase. The control circuit passes through a
manual switch, the temperature control, and the mag-
netic contactor coil. All items are pre-wired and
installed in a baked enamel steel case.
It is essential that the heater be installed in accor-
dance with the instructions given herein. Failure to do
so may cause damage to the heater and to the equip-
ment to which it is connected, or may prevent the
heater from operating in a correct manner. The heater
is to be installed in accordance with article 680 of the
National Electrical Code ANSI/NFPA No. 70. Consult
State and local codes BEFORE installing this unit.
Where such codes have requirements beyond the
instructions given herein, the codes shall have prece-
dence over these instructions.
Location
These heaters are listed by UL for either indoor or out-
door use. Unit must be mounted on a level base
parallel to the ground. Allow 6" clearance at sides and
18" clearance at top and front for maintenance. Secure
the unit with 5/16" mounting hardware using the holes
provided. The heater must be located where leakage
of heat exchanger or connections will not damage the
area adjacent to the heater or structure.
Water Connections
Bypass
(Customer Installed)
Drain Valve
(Customer Installed)
Gate Valve
Check Valve
To Spa
Filter
Chlorinator
Pump
From Spa
NOTE: PVC pipe may be used.
NOTE: When using two speed pumps, do not install
gate valve on inlet.
The Spa-Pak has 1-1/2" male NPT inlet and outlet
connections at the right side of the heater. The inlet is
at the base of the heater and must be piped directly to
the filter discharge to ensure proper flow direction.
Minimum flow rate through the heater is 15 gpm, max-
imum is 60 gpm. If this is exceeded, an external
bypass must be added as shown. Unions should be
used on piping connections. A shut-off valve should be
included on the heater inlet to prevent draining the spa
when performing maintenance.
CAUTION: No shut-off valves are to be installed in
the piping between the heater outlet and the spa.
Any chlorinators, valves, etc., that can cause return
line blockage will void the warranty.
Automatic Chlorinators and
Chemical Feeders
All chemicals must be introduced and completely dilut-
ed into the spa water before being circulated through
the heater. Do not place chlorine tablets or bromine
sticks in the skimmer. High chemical concentrations
will result when the pump is not running (e.g.
overnight).
Chlorinators must feed downstream of the heater and
have an anti-siphoning device to prevent chemical
backup into the heater when the pump is shut off.
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