Rapid Engineering UHAT 150, Installation, Operation & Service Manual

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UHA S
TANDARD
U
NIT
H
EATER
I
NSTALLATION
O
PERATION AND
S
ERVICE
M
ANUAL
34 of 59
11.3 Pressure Switch
The pressure switch is factory pre-set for each
model and is not adjustable.
11.4 Turning Off the Heater
Set the thermostat to the "OFF" position or lowest
setting and the main burner will stop.
The fan(s) will continue to run until it is stopped
automatically by the fan thermostat.
Do not use a disconnect switch for control of
heater. Disconnect switch will turn off the fan.
Heat exchanger could be damaged. Warranty will
not cover damage to the heat exchanger if
operated improperly. Only use the disconnect
switch for turning off heater for service or during
off-season.
11.5 External Controls
External controls may include time switch, interlock
switch, room thermostat and frost thermostat.
Operate each control to ensure that they function
correctly. Set the switches (if fitted) and
thermostat(s) to the users’ requirements.
11.6 Complete the Start-Up
Ensure that all covers are fitted correctly and all test
points are properly sealed.
11.7 Instruction to the User
Explain the controls of the heater to the user
including how to turn it on and off, using the controls
equiped on site.
Give this manual to the user.
Ensure that the user is shown and understands the
importance of maintaining clearances to
combustibles on Page 7, Figure 3, installer
responsibility on Page 4, Section 2 and user
instructions on Page 35, Section 12 and all
warnings defined in this manual.