York MA Technical Manual

TECHNICAL
TECHNICAL
GUIDE
GUIDE
MODELS: MA
MODULAR AIR HANDLERS
FOR USE WITH SPLIT SYSTEM
COOLING & HEAT PUMP
600 - 2000 CFM BLOWERS
2 - 5 TON COILS

OPTIONAL 1 & 3 ELECTRIC HEATERS
Certified Quality
Management System
Due to continuous product improvement,
specifications are subject to change without notice.
Visit us on the web at:
www.york.com
Additional rating information can be found at:
www.ahridirectory.org
FOR DISTRIBUTION USE ONLY - NOT TO BE USED AT POINT OF RETAIL SALE
ISO 9001
DESCRIPTION
This unique modular system allows the flexibility to handle any
application. These versatile coils and blowers may be used for
upflow, down-flow, or horizontal left or right applications. They
may be combined to function as a cooling only unit or with a
heat pump including electric heat for 1 and 3 phase applica-
tions. The blower and electric heater could be used as stand
alone electric furnaces.
FEATURES
Blowers - Models to match any air flow or voltage requirement.
The compact size allows easy installation. Blowers are sized to
deliver design air quantity both efficiently and quietly. The
direct-drive, multi-speed blower motors provide a selection of
air quantities to match any application. All models include a
one-minute blower off delay as standard to enhance system
efficiency ratings. The durable, pre-painted steel protects the
unit against rust and corrosion. All models have 1 inch foil face
fiber glass insulation, providing a thermal insulation value of R-
4.2.
Coils - Staggered rows of rifled copper tubes are mechanically
expanded into enhanced surface aluminum fins to provide high
heat transfer and long-lasting quality. The MC multi-position
coils may be used for upflow, downflow, and horizontal left or
right applications. Coil cabinets are insulated with 3/4" foil face
insulation to prevent sweating.
Thermal Expansion Valves - Available with R-22 or R-410A
factory installed TXV's. Air Handlers maybe ordered as "Flex-
coil" unit without a factory installed mertering device. Flex-coil
models allow for field installed R-22 or R-410A TXV's for added
flexibility to meet refrigerant system choice.
Electric Heaters - Both single and three phase electric heater
models are available to match any requirement. All heaters
include nickel-chromium elements with a 5-year limited war-
ranty on 1 Ø heating elements and 1 year limited warranty on 3
Ø heating elements. Sequential operation is provided to control
heaters in all models. Circuit breakers are used in 208/230 volt,
single-phase heaters of 15 KW and larger.
Models equipped with circuit breakers may be altered in the
field to use multi-source power supply. Over-temperature limit
switches provide protection from airflow loss with fusible link
backup protection.
NOTE: No heat kits are available for 115 Volt models.
Accessories - A full line of matching accessories available for
use with the blower and coils to allow any type application.
LIMITATIONS
These units must be wired and installed in accordance with all
national and local safety codes.
Voltage limits are as follows:
BLOWER VOLTAGE VOLTAGE CODE
115-1-60
208/230-1-60
460-3-60
* Rated in accordance with ARI Standard 110, utilization range "A".
Air flow must be within the minimum and maximum limits approved for electric
heat, evaporator coils and outdoor units.
253462-BTG-N-1010
NORMAL OPERATING
VOLTAGE RANGE*
11 104-126
21 187-253
41 432-504