York B1HP024 THRU 048, Technical Manual

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036-21528-001-A-0303
Unitary Products Group 3
PROTECTED COMPRESSOR
The compressor is internally protected against high
pressure and temperature. This is accomplished by the
simultaneous operation of high pressure relief valve
and a temperature sensor which protects the compres-
sor, if undesirable operating conditions occur.
EXCLUSIVE COIL DESIGN
Grooved copper tubes and enhanced aluminum fin
construction improves heat transfer for maximum effi-
ciency and durability.
LOW MAINTENANCE
Long life, permanently lubricated condenser and evap-
orator fan motor bearings, need no annual mainte-
nance. Blower assembly can be easily cleaned by the
unique ìSlip Trackî slide-out blower assembly.
SECURED SERVICE ACCESS PORTS
Protected, externally mounted, re-usable service
access ports are provided on both the high and low
lines for ease of evacuating and charging the system.
EASY SERVICE ACCESS
A large, single hinged panel covers the electrical con-
trols and makes servicing easy. The blower compart-
ment has an additional large panel with a built-in
handle tab. Removing this panel will allow the blower
assembly to slide-out for easy removal for mainte-
nance and ease of trouble shooting.
REPLACEMENT PARTS
The installer has no need to carry an inventory of
unique parts or needs special training to replace any of
the components parts for these units. All are easily
obtained from Source 1 or other major part houses.
FIELD-INSTALLED ACCESSORIES
ECONOMIZER DOWN DISCHARGE / SUPPLY KIT
Modulating integrated economizer provides simulta-
neous operation between the mechanical cooling and
economizer operation. Independent blade design
insures proper control and less than 1% leak rate.
Includes hood and mesh bird screen filter integrated
into the hood, dry bulb sensor and relief damper. Sepa-
rate field accessories of single enthalpy and dual
enthalpy are also available.
SINGLE ENTHALPY SENSOR
Sensor replaces dry bulb sensor standard in econo-
mizer kit. Provides improved economizer operation by
sensing the dry bulb temperature from outdoors, plus
the enthalpy content of the outdoor air.
DUAL ENTHALPY SENSOR
Additional sensor to single enthalpy sensor. Sensor
selects both the return air temperature dry bulb and
humidity, in conjunction with the single enthalpy, to
determine the most economical mix. Single Enthalpy
sensor also required.
UPGRADE PRESSURE PACKAGE
Contains screw in type High pressure, Low Pressure/
Loss of Charge switch, freeze protection switch and
lockout relay. Switches are placed onto existing
Schrader ports located in the unit by furnished adapt-
ers. When abnormal conditions are sensed through the
pressure switches, the unit will lock out, preventing any
further operation until reset or problem is corrected.
Package agency approved.
HAIL GUARD KIT
Kit contains protected grilles made of expanded alumi-
num grilles with full perimeter 1-1/2 inch frame. Sloped
hoods are also included to assure maximum protec-
tion.
FILTER / FRAME KIT (SINGLE PHASE ONLY)
Kit contains the necessary hardware to field install
return air filters into the base unit. Pre-cut filter racks
and appropriate cleanable standard size filters are
shipped in one kit (1" filter is supplied). This kit is avail-
able for single phase horizontal or vertical duct applica-
tion only. Standard in all 3 Phase models.
MOTORIZED FRESH AIR DAMPER
Designed for duct mounted side return and unit
mounted down shot return applications. Damper capa-
ble of providing 0% thru 50% of outdoor air (field sup-
plied). Closes on power loss, includes hood and screen
assembly.