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FILTER
INSTALLATION
AIR FILTERS
TABLE
4
Filters are to be used with the YCZ036,050,060F
heating/cooling
units. The basic unit does not have filters in it. However, a filter
frame accessory is offered that wilt allow filters to be installed within
the unit.
Otherwise a filter rack must be installed by the installer in the duct
work,
Affix the filter label supplied with the unit adjacent to the filter area.
NOMINAL
FILTER*
FILTER
UNIT
CFM
Sq.Ft.- SIZE
RESISTANCE
YCZ036F
1200
4
0.05
YCZ050F
1600
5.33
0.05
YCZ060F
2000
6.67
0.05
*Filters
must be installed
in the return air system.
The above square
footages are based on 300 F.PM. face velocity.
If permanent
filters are
used, size per mfg. recommendation
with clear resistance
of 0.05" WC.
ELECTRICAL
WIRING
ELECTRICAL
CONNECTIONS
Electrical wiring and grounding must be installed in accordance with
local codes or, in the absence of local codes, with the National
Electrical Code ANSI/NFPA 70, Latest Revision.
ELECTRICAL
POWER
It is important that proper electrical power be available for the unit.
Voltage variation should remain within the limits stamped on the unit
nameplate,
DISCONNECT
SWITCH
Provide an approved weatherproof disconnect either on the side of
the unit or within close proximity and within
sight of the unit.
OVER CURRENT
PROTECTION
The branch circuit feeding the unit must be protected as shown on
the unit rating plate.
POWER
WIRING
The power supply lines must be run in weathertight
conduit to the
disconnect and into the bottom of the unit control box. Provide strain
relief for all conduit with suitable connectors.
Provide flexible conduit supports whenever vibration transmission
may cause a noise problem within the building structure.
Be sure all connections are made tight. See Figure 18.
NOTE: Unit must be grounded for ignitor
to operate prop-
erly. Gas pipe to unit is not an adequate
ground. Ground
the unit internally
as provided.
See wiring
diagram
for
location.
CONTROL WIRING (CLASS II)
Low voltage control wiring should not be run in conduit with power
wiring unless Class 1 wire of proper voltage rating is used. Route
the thermostat cable or equivalent
single leads of No. 18 AWG
colored wire from the thermostat
subbase terminals through the
rubber gromment on the unit. See Figures 3 and 4 for the control
entry location.
Make connections
as shown on the unit wiring
diagram and in Figure 18.
Do not short thermostat wires since this wilt damage the control
transformer.
Recommended wire sizes and lengths for installing the unit thermo-
stat are provided in Table 5. The total resistance of these low voltage
wires must not exceed one (1) ohm. Any resistance in excess of 1
ohm may cause the control to malfunction because of the excessive
voltage drop.
TABLE
5
THERMOSTAT
WIRE SIZE AND MAXIMUM LENGTH
WIRE SIZE
MAXIMUM LENTGH (Ft)
18
75
16
125
14
200
NOTES: For branch circuit wiring (mare power supply to unit
disconnect), wire size forthe length of run should be determined
using the circuit ampacity found on the unit nameplate and the
N.E.C.
For more than 3 conductors in a raceway or cable, see the
N.E.C. for derating the ampacity of each conductor.
GROUNDING: THE UNITMUST BE ELECTRICALLYGROUNDED
IN ACCORDANCE
WITH LOCAL CODES OR THE NATIONAL
ELECTRIC CODE.
Page 16
THERMOSTAT
HEAT ANTICIPATOR
The thermostat heat anticipators should be set to .4 amps on single
or two stage thermostats.
IMPORTANT:
Upon completion of wiring
check all electrical
connections,
including factory
wiring
within
the unit,
make
sure all connections are tight. Replace and secure all electrical box
covers and access doors before leaving the unit or turning on the
power to the unit.
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