9
OWNER’S MANUAL
If pressure differential reading differs from the chart, the
following steps should be taken:
1. PRESSURE LOWER THAN CHART
A.Check for restrictions in duct work such as closed
registers, blocked return air grills or dampers in duct
work not adjusted properly.
B.Check filters to verify that they are clean.
C.Check belt tension. The belt should have
approximately 1” of play up or down. Replace any
worn or frayed belt.
D.If duct work is free of obstructions, the adjustable
motor pulley should be closed until correct pressure
reading is achieved.
2. PRESSURE HIGHER THAN CHART
A.Unit does not have duct work or dampers in duct
work not adjusted properly.
B.Air filters not in unit.
C.To reduce air flow pressure, open adjustable motor
pulley and reset belt tension to 1” play up or down
until correct pressure reading is achieved.
D.In a no duct work installation (Free blow) a 4 foot duct
extension must be installed on supply outlet of unit.
Adjust motor pulley following the instructions above.
NON DUCTED INSTALLATIONS
When the installation of duct work is not possible the
unit must be positioned in such a manner that return air
into the unit is not obstructed and sufficient air can enter
the unit. Place unit usually high in the room out of reach of
users but accessible for normal maintenance and service.
Direct air from supply of unit toward exterior glass,
skylights and walls. Short cycling of air or loop effect will
give poor performance. Position for optimum air circulation
for best results.
UNIT OPERATION
ATTENTION INSTALLERS / OPERATORS
Main power to the unit crankcase heater must be on for
12 hours before unit is started. Under no circumstances
should the unit be run for temporary heat when building
construction is in progress or when there is no water in the
pool.
HUMIDISTAT
This control turns the unit on or off when the humidity in
the room rises above or falls below the set point of the
control.
Control is factory set and covers a humidity range of
20% to 80%. Typical pool room humidity setting would be
between 50% to 60%. Remember that the lower the
humidity setting the longer the unit will run and the higher
the operating costs.
AUTOMATIC CHANGEOVER THERMOSTAT
Other control systems may be provided. The following
explains standard snap action humidistat and auto change
over thermostat. See additional instructions for other
control systems available, not in this manual.
This control maintains the temperature in the room. Set
thermostat at desired temperature, usually between 75° F
to 85° F. The thermostat is an automatic change over type
which will automatically switch to air conditioning (with
remote condenser option) or heating. This thermostat
provides the following operating options.
SYSTEM SWITCH
HEAT
- In the heat position unit will supply warm air to
room. Unit will start on a call from either the humidistat or
thermostat. If unit does not have remote condenser option
system switch must be set in heat position.
COOL - This position must not be used. See auto position.
AUTO - This position allows the unit to run and supply
either warm air or cool air to the room. The unit will run in
the cooling cycle if temperature rises above set point or in
the heating cycle if temperature drops below set point.
OFF - This position disengages the unit regardless of
temperature or humidity.
IN NO CIRCUMSTANCE
ALLOW THE RETURN AIR OF UNIT,
WITH NO DUCT WORK ATTACHED,
TO BE PLACED IN SAME ROOM
AS POOL HEATERS OR ANY OTHER
FOSSIL FUEL BURNING APPLIANCES.
DEATH CAN RESULT
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