Weather-Rite TT Series, Installation, Operation & Service Manual, Page: 91 / 205

SECTION 19: E
LECTRICAL
85 of 198
SECTION 19: ELECTRICAL
Each air handler is eq u ipped w ith a w iring diagram
w hich w ill v ary depending on the type of controls and
options s u pplied.
NOTE: Spark testing or shorting of the control w ires
b y any means w ill render the transformers
inoperati v e.
19.1 Wirin g and Electrical Connections
All electrical w iring and connections, incl u ding
electrical gro u nding, m u st comply w ith;
United States: Refer to National Electrical Code ® ,
NFPA 70 - latest re v ision. Wiring m u st conform to the
most c u rrent National Electrical Code ® , local
ordinances, and any special diagrams f u rnished.
Canada: Refer to Canadian Electrical Code, CSA
C22.1 Part 1 - latest re
v ision.
Check rating plate on air handler for s u pply v oltage
and c u rrent req u irements.
If any of the original control w ire s u pplied w ith the air
handler m u st b e replaced, replace it w ith type THHN
221 °F (105 °C), 600 V, 16 ga u ge w ire or eq u i v alent.
For all other w ires, replace w ith the eq u i v alent size
and type of w ire that w as originally pro v ided w ith the
air handler.
19.2 Remote Panel
The remote panel m u st b e w ired as sho w n on the
electrical schematic.
All po w er s u pply and motor w iring m u st b e type
THWN - or eq u i v alent, minim u m w ith a 167 °F
(75 °C) temperat u re rise. For w ire ga u ge sizes, See
Page 85, Table 35 .
19.2.1 Remote Panel Mountin g Distance
If the inter connection w iring b et w een the remote
panel and the air handler control enclos u re is r u n in a
single cond u it, the w ire r u n can b e as long as 100'
(30 m). If the interconnection w iring b et w een remote
panel and the air handler control enclos u re is r u n in
t w o cond u its (separating the shielded ca b le and the
120 v po w er s u pply for the remote panel), the w ire r u n
can b e as long as 200' (60 m) For longer w ire r u ns,
cons u lt the factory. Care sho u ld b e u sed to a v oid
r u nning the interconnect w iring near large ind u strial
loads or high v oltage w ire r u ns as that may f u rther
limit the length of the interconnect w ire r u n.
Table 35: Control Volta g e Wirin g For All Control
Systems
NOTE: Wiring for temperat u re controls m u st b e r u n in
shielded ca b le as indicated on the w iring diagram.
19.2.2 Low Volta g e Control Wirin g
Lo w v oltage (24V - AC/DC) control w iring in excess of
100' (30.5 m) in length sho u ld b e in its o w n separate
cond u it r u n to pre v ent interference.
19.3 Motor Current Draw
For c u rrent req u irements of the motor, see rating
plate located on the b lo w er motor. C u rrent dra w may
b e adj u sted do w nard b y red u cing b lo w er rotations
per min u te (RPM) or b y increasing external static
press u re.
19.4 Control Current Draw
The maxim u m c u rrent dra w for an air handler’s
controls and accessories is 4.5 A.
DANGER
Electrical Shock Hazard
Disconnect electric before service.
More than one disconnect switch may be
required to disconnect electric from
equipment.
Equipment must be properly grounded.
Failure to follow these instructions can result
in death or electrical shock.
VOLTS WIRE GAUGE WIRE FEET
120 18 150 (45 m)
120 16 250 (75 m)
120 14 350 (106 m)