Operation and Maintenance, Specific Changes | EMI EMI Corp specification

MULTI-ZONE CONDENSER SEQUENCE OF OPERATION

When the outdoor temperature falls below 35°F, compressor operation will cease. At that point the unit will switch on the indoor units electric heater to assume the heating demand, (second stage of heat).

Note: For full operation the indoor unit must have an electric heater.

S2HA LOW VOLT INTERCONNECT DIAGRAMS

WL HA Wall unit

Heat Pump Applications

O.D. UNIT		I.D. UNIT	OPTIONAL WALL T'S TAT
(R ) R E D		(R ) R E D		(R ) R E D
(R ) R E D				(R ) R E D
(C ) B R N	��	(C ) B R N	�	(C ) B R N
(W) WHT		(W) WHT	��	(W) WHT
(W) WHT		(O) OR G	��	(W) WHT
(O) OR G		(O) OR G		(O) OR G
(O) OR G		(Y) YE L		(O) OR G
(Y) YE L		(Y) YE L		(Y) B L K
(Y) YE L				(Y) B L K

(G ) G R N (Yin) B L K

(G ) G R N

*- S ome thermos tats do not us e a " C " terminal ** - E lectric heat option

C AHB HE AT P UMP

L OW VOL TAG E INTE R C ONNE C T DIAG R AM

O.D. UNIT	I.D. UNIT	WAL L T'S TAT
(C ) B R N	B R N (C )	*C
(C ) B R N
(R ) R E D	R E D (R )	R
(R ) R E D
	B L K (Y )	Y
(Y ) Y E L	Y E L (Y 1)
(Y ) Y E L
(O) OR G		O
(O) OR G
	G R N (G )	�

*S OME T" S TATS MAY NOT HAVE A " C " TE R MINAL OP TIONAL

Refer to the indoor unit for the proper low Volt interconnect wiring.

OPERATION AND MAINTENANCE

The EMI America Series outdoor section is the compressor bearing unit of the system. It operates at the command of the indoor section or room thermostat. Therefore, the operation will be described in the manual pertaining to the indoor section. The S2HAwill cease compressor operation at 35°F outdoor temperature. If in heating mode, the electric heat will take over when the compressor ceases operation.

EMI units are designed and constructed for reliability and long life with minimal main- tenance. You can assure peak operating efﬁciency by regularly inspecting for free air passage into and through the coil. If debris collect on the air coil, it should be cleaned by "back-ﬂushing" with a spray of water or vacu- uming. TURN OFF POWER SUPPLY FIRST. Outdoor units may be cleaned or waxed if desired. Use a non-abrasive car wax.

Panels should remain on the unit at all times. Service should be performed by a QUALI- FIED service agency only.

SPECIFIC CHANGES

All EMI products are subject to ongoing de- velopment programs so design and speciﬁ- cations may change without notice. Please

consult the factory for more information.

GENERAL RECOMMENDATIONS

Do not charge the straight cool units on cold days unless weighing in the charge. The heat pump systems may be charged in heat cycle between 35 and 75°F. These units use a heat cycle TXV and cannot be charged to superheat; use weight or subcooling method only.

Charging should be done with a dial-a- charge or weighed in with a scale.

NOTE: For more information, please visit our web-site at www.enviromaster.com or

call 1-800-228-9364.

Multi-zone Heat Pump Condensing Units

www.enviromaster.com

EMI Corp specifications

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