Dettson Chinook C105-M-V, Инструкции по установке и руководство для владельца

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10 THERMOSTAT AND CON-
TROLS
WARNING
Do not apply 24Vac to V/W2 at the furnace con-
trol (this is sometimes done during setup, trou-
bleshooting and/or while diagnosing problems).
Doing so will damage the thermostat.
10.1 NON-COMMUNICATING
MODULATING THERMOSTAT
The furnace must be installed with the Modulating
Touch-Screen Thermostat R02P030 (#1F95M) if used
without the Alizé Cooling Unit.
NOTE:
Do not use 24 volt control wire smaller than No.
18 AWG.
Wire all non-communicating thermostats to the 24V con-
nections on the integrated furnace control. See figure 14
NOTE:
A larger wire gage may be required for longer
lengths of thermostat wire.
Operations with a non-communicating modulating ther-
mostat are fully modulating between 40% and 100% of
furnace capacity. The firing rate is first determined by
the thermostat and then sent to the furnace. This is the
optimum mode of operation and will give the best tem-
perature control with minimal temperature variation from
the desired set point.
10.2 THERMOSTAT INPUT
These connections are used with any traditional 24 V AC
modulating non-communicating, thermostat specified for
this modulating furnace. W1, Y1, Y2, G, C and R are
the traditional thermostat inputs used in nearly all HVAC
equipment. Installation of the thermostat to these con-
nections is straight- forward and simple.
HUM STAT – This terminal is used to connect the output
of a humidistat to the furnace control to control humid-
ification and/or dehumidification. Optional equipment is
required for these features.
V/W2 – This terminal is used to connect the modulat-
ing signal (V) from a non-communicating, fully modulat-
ing thermostat specified for use with this furnace. It is
used to transmit the firing rate (determined by the ther-
mostat) to the furnace control.
NOTE: Do not apply 24 VAC to the V/W2 terminal (as
with a jumper to R for diagnostic purposes) with a
non-communicating, modulating thermostat.
B
- This terminal is used to pass a reversing valve signal
to a condenser. It is only a holding place for connect-
ing a wire from the thermostat and a wire from the con-
denser. It does not change the airflow of the cool/heat
commands.
10.3 FUSE
A three-amp automotive-style (ATC blade type) fuse is
supplied on the furnace control board. This fuse should
provide protection from short-circuits on the control board
and associated 24 VAC wiring.
Any direct shorts during installation, service, or mainte-
nance could cause this fuse to blow. If fuse replacement
is required, use ONLY a 3 amp. It is located on the control
board. Refer to Figure 11.
10.4 120 VAC TERMINALS
These terminals supply 120 VAC to the furnace control.
Spare terminals are provided for use with electronic air
cleaners and other accessories as needed (Check the
voltage rating of your equipment.)
10.4.1 Electronic air cleaner EAC (E103)
This output is used to energize an electronic air cleaner.
The output will provide 1.0 amp at 120 VAC. This out-
put is energized any time the blower motor is above 40%
of maximum airflow capacity. Airflow below this value is
not considered to be enough for a typical electronic air
cleaner to perform properly.
For ½ HP and ¾ HP motors – Electronic air cleaner is
energized any time the blower is above 320 CFM
For 1 HP motors - Electronic air cleaner is energized any
time the blower is above 800 CFM
10.4.2 HUM terminal
HUM terminal is only energized when blower is energized
in heating.
10.5 Stepper gas valve control
The furnaces is equipped with a stepper modulating gas
valve. A five-pin connector is used to control and sense
the gas valve. The valve uses a PWM (Pulse Width Mod-
ulated) signal to control the firing rate. The duty cycle
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