32
PACKAGE CONTENTS
Table 17 – Package Contents - CRHEATER 101A00 to
109A00, 103B00, and 104B00
Quantity Contents
1
Heater module
1
Heater slider track*
4
Screws*
1
Wiring lab el
1
Red wire (10 gage)†
1
Splice connector†
1
Wire tie†
1
Label, max temp/static
1
Heater cover
*Not included with CRHEATER101A00- 109A00
†Supplied with electric heater packages CRHEATER101A00, 102A00,
103B00, 104B00 only.
Table 18 – CRSINGLE037A00
Item Description Quantity
Single Point Box Housing Assembly
(Height 18 in/449 mm)
1
Ter min al b loc k 1
Conductors, Tap, #10 3
Rain shield with conduit seal 1
Screws, #10 x 1/2 in 12
Wire ties 7
Tube clamp 1
Seal strip 1
Table 19 – CRSINGLE038A00
Item Description Quantity
Single Point Box Housing Assembly
(Height 18 in/449 mm)
1
Ter min al b loc k/ Fu se h old er 1
Fuse block 1
Fuses, 60A class RK5 6
Power distribution harness 1
Conductors, Tap, #10 3
Rain shield with conduit seal 1
Screws, #10 x 1/2 in 12
Wire ties 7
Tube clamp 1
Seal strip 1
GENERAL
This installation instruction manual describes the
installation of electric heaters and associated fuse
block/field power termination kits (single point box or
SPB) on select small rooftop units in nominal cooling
capacities from 3 to 5 tons.
This information does not include selection data. Refer to
project plans, job submittals and selection programs for
heat er and field power termination/SPB kit usage.
Electric Heaters
Heaters are shipped with one heater per carton. The carton
is marked with a sales package number.
The heaters are modular in design, with heater frames
holding open coil resistance wires strung through ceramic
insulators, limit switches and one or two control
contactors. Power conductors are attached. One or two
heat er modules may be used in a unit.
Heate r modules are installed in the compartment below
the indoor (supply) fan outlet. Access is through the
indoor access panel. Heater modules slide i nto the
compartment on tracks along the bottom of the heater
opening (See Fig. 47). Some heaters are ”keye d” with a
restrictor bar on the heater frame or restrictor plate on the
back of the heater mounting plate to be able to go in only
one slot. These keyed heaters have been designe d and
qualified to go only into the designat ed slot. Do not
remove the key for the purpose of putting the heater in the
wrong slot. Placing a keyed heater in the wrong slot could
lead to overheating and unit damage from the heater not
operating properly.
NOTE: The following heaters do not use the slide track:
CRHEATER101A00- 109A00.
Not all available heater modules may be used in every
unit. Use only those heater modules that are UL listed for
use in a specific size unit. Refer to the label on the unit
cabi net and the unit data plate for the list of approved
heaters.
Single Point Boxes and Fuses
Single Point Box (SPB) kits provide field power
termination location plus an enclosure for heater fuses
when requi red by code. The SPBs are installed under
unit’s main control box and include a cover plus all
internal wiring. Minimum components of the SPB are a
field power terminal block with tap conductors to connect
to the unit’s main control box field terminals. Maximum
compone nt population includes up to five fuse bl ocks.
Fuses for electric heater circuits are requi red and provided
when the unit’s MOCP exceeds 60- A or when the total
heater full load amp value exceeds 48- A. When fuses are
required and provided, the cooling circuit is a lso provided
with fuse protect ion. Some units require minor wiring
change s in the main control box (see section on TB10
terminal blocks).
40QQ
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