17
SPECTRA COMMERCIAL AND RESIDENTIAL INSTALLATION GUIDE
Before Starting Unit, Check The Following:
❏
High voltage is correct and matches nameplate
❏
Fuses, breakers and wire size correct
❏
Low voltage wiring complete
❏
Piping completed and water system cleaned and flushed
❏
Air is purged from closed loop system
❏
Isolation valves are open, water control valves or loop pumps wired
❏
Condensate line open and correctly pitched
❏
Transformer switched to lower voltage tap if needed
❏
Dip switches set correctly (commercial microprocessor only)
❏
DHW pump switch off unless piping is completed and air has been purged
❏
Blower rotates freely - foam shipping support has been removed
❏
Blower speed correct (taps on correct pins)
❏
Air filter is clean and in position
❏
Service/access panels are in place
❏
Return air temperature is between 60-80
°
F in heating and 70-95
°
F in cooling
❏
Air coil cleaned
Start Up Steps:
1)
Initiate a control signal to energize
the blower motor. Check blower
operation.
2)
Initiate a control signal to place the
unit in the cooling mode. Cooling
set point must be set below room
temperature.
3)
First stage cooling will energize
after a time delay.
4)
Be sure that the compressor and
water control valve or loop pumps
are activated.
5)
Verify that the water flow rate is
correct by measuring the water
pressure drop through the heat
exchanger using the P/T ports and
comparing to water pressure drop
found in Table 3.
6)
Check the temperature of both the
supply and discharge water. Refer
to Start Up Performance Table 2
7)
Check for an air temperature drop
of 15
°
to 25
°
F across the air coil,
depending on the fan speed and
entering water temperature. Refer
to unit operating pressures on
page 13.
8)
Adjust the cooling set point above
the room temperature and verify
that the compressor and water
valve or loop pumps deactivate.
Unit Start Up
Table 3 -
Water Pressure Drop Table
Table 2 -
Temperature Change Through Heat Exchanger
Water Flow Rate
Water Temperature
(GPM)
Change (Deg
°
F)
Rise (Clg)
Drop (Htg)
For Closed Loop: Ground Source or
9 - 12
4 - 8
Cooler/Boiler systems at 3 gpm/ton
For Open Loop: Ground Water systems
20 - 26
10 - 17
at 1.5 gpm/ton
FLOW RATE
PRESSURE DROP (PSI)
MODEL
GPM
30
°
F
50
°
F
90
°
F
1.5
2.1
2.0
1.9
SX010
2.0
3.4
3.2
3.0
2.5
5.2
4.9
4.6
1.5
2.0
1.9
1.8
SX013
2.5
4.6
4.4
4.1
3.5
8.1
7.7
7.2
2.0
3.0
2.9
2.7
SX016
3.0
5.9
5.7
5.3
4.0
9.7
9.3
8.7
3.0
1.2
1.2
1.1
SX019
4.0
2.1
2.0
1.9
5.0
3.5
3.3
3.1
3.0
1.5
1.4
1.3
SX024
4.5
3.2
3.1
2.9
6.0
6.0
5.8
5.4
4.0
1.2
1.2
1.1
SX030
5.5
2.1
2.0
1.9
7.0
3.2
3.1
2.9
5.0
2.4
2.2
2.1
SX036
7.0
3.9
3.7
3.5
9.0
6.2
5.9
5.5
5.0
1.7
1.6
1.5
SX042
8.0
3.5
3.3
3.1
11.0
6.2
5.9
5.5
6.0
3.5
3.1
2.3
SX048
9.0
6.7
5.9
4.2
12.0
10.7
9.5
7.0
8.0
4.1
3.7
2.8
SX058
11.0
6.6
6.0
4.7
14.0
10.0
8.9
6.6
10.0
6.1
5.4
3.9
SX068
13.0
9.3
8.2
6.0
16.0
13.0
11.7
9.0
Note: To obtain maximum performance the air coil should be cleaned
before start up. A 10% percent solution of dishwasher detergent and water
is recommended for both sides of coil. A thorough water rinse should follow.
