Envision NCW09-18, Руководство по установке

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ENVISION CONSOLE INSTALLATION MANUAL
Control General Description Application Display/Interface Protocol Thermostat Options
CCM Control The CCM (Compressor control module)
is a more reliable replacement for
electro-mechanical control applications.
It features a small microprocessor
board that handles the lockout function
of the unit. A second microporcessor
handles the unit mounted thermostat for
maintaining accurate room temperature. Residential and commercial
applications requiring minimal but
reliable controls. Includes Random
Start, High and low pressure
switches and auto changeover
capability. Dial thermostat with Hi and
Low fan speeds, and auto
changeover or cont fan
selection switches. None Unit Mounted Digital
Dial Thermostat
Remote Mounted
Standard Thermostat
Standard CCM Control Features
Compressor control module (CCM) controls are standard
on the Envision console heat pump. This control features
unit mounted thermostat and switches,
Features of the standard control are:
• Easy to understand color coded thermostat
adjustment markings.
• Large, rocker type mode and fan switches.
• Internally mounted fan switch to choose cycled or
constant fan operation.
• High pressure and low pressure safety controls to
protect the unit components.
• Lockout circuit to shut down unit operation upon
receipt of a fault indicator from the safety controls.
• A 24 volt control circuit allows for safe and
easy diagnosis.
The user selects either “Heat/Cool” or “Fan Only” on the
mode switch, then either “High” or “Low” at the fan speed
switch. The temperature can be controlled by rotating the
thermostat control knob.
The “Fan Only” setting provides constant fan operation.
In the “Heat” mode, a call for heat by the thermostat closes
the compressor contactor contacts, energizing the com-
pressor, which will run until the thermostat is satisfied.
In the “Cool” mode, a call for cooling by the
thermostat energizes the reversing valve and closes the
compressor contactor contacts, energizing the compres-
sor, which will run until the thermostat is satisfied.
The emergency electric heat operation in the “Heat/Cool”
mode is subject to the setting of the internally mounted
mode switch. The optional, factory installed electric heat
will operate when the internally mounted mode switch is
in the “Emergency Heat” mode. In the “Heat” mode, a call
for heating energizes the fan and electric heater contactor,
energizing the electric heat elements and fan, which will
run until the thermostat is satisfied. When the internally
mounted mode switch is in the “Normal/Boilerless” mode
the unit operates in its normal “Heat/Cool” operation,
unless there is an aquastat controller. When the normally
open circuit of the aquastat closes and the unit is in the
heating mode, it will switch to the “Emergency Heat”
condition until the thermostat is satisfied or the aquastat
opens restarting the compressor.
If either the low or high pressure safety switches are
opened, the compressor and reversing valve are disabled
by the lockout relay. Unit operation will resume only after
the voltage to the unit is interrupted or the mode switch is
placed in the “Off” position.
If the electric heat limit switches are opened, the electric
heat is disabled.
Controls - CCM
Figure 6: Unit Mounted Control