Electrical Connections
Installation and wiring shall be in accordance with
requirements of authority having jurisdiction In absence of
such requirements refer to:
• USA- National Electrical Code, ANSI/NFPA 70.
• Canada - Canadian Electrical Code, Part I, CSA C22.1:
Safety Standard for Electrical Installations.
Units Rated 208/230V:
• RetroAire unit is wired for 230V primary voltage from
manufacturer.
• Transformer must be rewired by installer if job site
voltage is 208V.
• Change transformer tap from orange to red. See
wiring diagram for details. Wiring diagrams can be
found on inside of control door. See individual model
illustrations.
Setting Control Board Jumpers
Control board has two sets of factory installed jumper
pins:
HP
jumper and
TEST
jumper.
HP Jumper
— selects heat pump or straight cooling.
Pins determine whether unit operates as straight cooling or
as heat pump. See figures 29 and 30.
• Jumper right pin to center pin for heat pump operation.
• Jumper left pin to center pin for straight cooling
operation.
TEST Jumper
— selects normal or test mode
NOTICE
Do not leave unit operating with TEST jumper in
TEST position.
•
Jumper is for testing only. See figures 29 and 30.
• When jumper pins are jumped together, all timers are
eliminated
(example — anti-short cycle, purge, etc.)
.
•
May be used for field testing. Units are factory set with
jumper on only one pin
(normal operation position)
.
FINAL INSPECTION & START-UP
Heat Pump Mode
(Jumper center
& Bottom pins)
Straight
Cool Mode
(Jumper center
& Top pins)
HP
HP
Normal operation
(pins not jumped)
Test mode
(pins jumped)
Figure 29
- HP Jumper
(selects heat pump or
straight cooling)
Figure 30 - TEST jumper (selects normal or
test mode)
29
Made in USA
P/N 240010545, Rev. B [10/24/2014
]
