Manual 2100-646
Page
15 of 26
site variables. Telecommunication type
installations in high traffic areas or in areas with
frequent airborne debris will require more frequent
coil maintenance than those in areas not subject
to those conditions.
SEQUENCE OF OPERATION
Non-Economizer
Stage 1 (7) cooling call activates Step 1 (partial
capacity, 66%) of compressor capacity.
Stage 2 (8) cooling call activates Step 2 (full capacity,
100%) of compressor capacity.
See Table 4.
HIGH AND LOW PRESSURE SWITCH
All models covered by this manual are supplied with
a remote reset high pressure switch and low pressure
switch. If tripped, this pressure switch may be reset
by turning the thermostat off then back on again.
COMPRESSOR CONTROL MODULE
The compressor control module is standard on the
models covered by this manual. The compressor control
is an anti-short cycle/lockout timer with high and low
pressure switch monitoring and alarm relay output.
A
djustable Delay-on-Make and Delay-on-Break Timer
On initial power up or anytime power is interrupted to
the unit, the
delay-on-make
period begins, which will
be 2 minutes plus 10% of the
delay-on-break
setting.
When the delay-on-make is complete and the high
pressure and low pressure switches are closed, the
compressor contactor is energized. Upon shutdown,
the delay-on-break timer starts and prevents restart
until the delay-on-break and delay-on-make periods
have expired.
During routine operation of the unit with no power
interruptions, the compressor will operate on demand
with no delay.
Terminal
Description
Use
Series "2"
Reference
1
Compressor on Output Signal from Jade to MV
Economizer Only
"A"
2
24VAC HOT
from Terminal 2 Connected to Unit Transformer
24V HOT
"R"
3
24VAC COMMON
from Unit Transformer to MV
24V COMMON
"C"
4
Unit Compressor Operation
Cooling Operation
"Y"
5
Close Damper Input (Close Blade 100%)
Economizer Only
"F"
6
Electric Heat On Operation, Stage 1 and 2
Heating Operation
"W1"
7
1st Stage Cooling Input, 1st Stage Cooling Signal to Jade
Economizer Only
"Y1"
8
2nd Stage Cooling Input, 2nd Stage Partial Cooling Signal to Jade
Economizer Only
"Y2"
9
Blower Operation (Indoor Blower On)
Blower Operation
"G"
10
Filter Switch Normally Closed Dry Contacts
Alarm Signal
"4"
11
Filter Switch Normally Closed Dry Contacts
Alarm Signal
"5"
12
Blade Switch Delay Relay Normally Closed Dry Contacts
Economizer Only
"8"
13
Blade Switch Delay Relay Normally Closed Dry Contacts
Economizer Only
"9"
14
Occupied Signal Input, Econ Emergency Open (Open Blade 100%)
Economizer Only
"E"
15
Econ Open Output (
6V HOT, 24V HOT
after Blade Open 100% and delay)
Economizer Only
"10"
16
Alarm Relay Common Dry Contact
Comp Alarm Signal
"3"
17
Alarm Relay Normally Open Dry Contact
Comp Alarm Signal
"2"
18
Alarm Relay Normally Closed Dry Contact
Comp Alarm Signal
"1"
19
24VAC HOT
to Terminal 2 from Unit Transformer Through Smoke Alarm Jumper
Wire*
24V HOT
"RT"
20
2nd Stage Heating On Operated Through Jumper to Terminal 6
Heating Operation,
2nd Stage
"W2'
21
Blade Switch Terminal
24V HOT
When Blade is Open, Sends Signal from Switch
to Delay Relay
Economizer Only
"7"
22
2nd Stage Cooling Input, 2nd Stage Full Capacity
Cooling Operation,
2nd Stage Full
“Y2”
TABLE 4
Sequence of Operation
* Replace jumper wire with smoke alarm connections to interrupt 24VAC unit power if smoke alarm is used in shelter. Jumper can also
be removed to break 24VAC power to unit.
