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FAN COIL |
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AIR CONDITIONERS |
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INSTALLATION, OPERATION, & MAINTENANCE |
NEW RELEASE |
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Form 115.20-NOM4 (105) |
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MODELS: YMB, YMB-HW, YMBE
YMB Series
(2-pipe, cooling and heating) (Replaces the MH Series)
YMB-HW Series
(4-pipe, cooling and heating) (Replaces the MH-HW Series)
YMBE Series
(2-pipe, cooling with electric heat) (Replaces the MHE Series)
00781VIP
LD07966
(See page 3 for details)
Notes:
1.For proper operation, control valve must be normally closed.
2.Aquastats provided where required.
3.Electric Heat is only available in the YMBE series. These units require a remote thermostat (low voltage 4 wire thermostat).
***** WARNING TO INSTALLER, SERVICE PERSONNEL AND OWNER *****
Altering the product or replacing parts with non-authorized factory parts voids all warranty or implied warranty and may result in adverse operational performance and/or a possible hazardous safety condition to service personnel and occupants. Company employees and/or contractors are not authorized to waive this warning.
L23954Y 1-05
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FORM 115.20-NOM4 (105) |
TABLE OF CONTENTS |
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INSTALLATION................................................................................................................................................. |
3-6 |
RECEIVING ................................................................................................................................................... |
3 |
STORAGE ..................................................................................................................................................... |
3 |
DESCRIPTION .............................................................................................................................................. |
3 |
HORIZONTAL APPLICATION....................................................................................................................... |
3 |
WIRING....................................................................................................................................................... |
3-4 |
YMBE SERIES .............................................................................................................................................. |
3 |
PIPING........................................................................................................................................................... |
6 |
PIPING PRECAUTIONS......................................................................................................................... |
6 |
DRAIN PIPING........................................................................................................................................ |
6 |
START UP............................................................................................................................................................ |
7 |
MAINTENANCE................................................................................................................................................... |
8 |
Reference Documents: |
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• Engineering Guide, Direct Drive YMB Models |
Form115.20-EG4 (Latest) |
• Parts List, Fan Coil Air Conditioners |
Form 115.20-RP2 (Latest) |
These documents can be ordered through Publications Dept.
or downloaded @ http://intranet.york.com/web0003/library/default.asp
TABLE 1 – SHIPPING WEIGHTS (LBS)
MODEL |
WT. |
MODEL |
WT. |
MODEL |
WT. |
8YMB |
115 |
8YMB-HW |
120 |
8YMBE |
115 |
12YMB |
120 |
10/12YMB- |
135 |
12YMBE |
120 |
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HW |
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16/20YMB |
210 |
16YMB-HW |
210 |
16/20YMBE |
210 |
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20YMB-HW |
264 |
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FIG. 1 – UNIT NOMENCLATURE |
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2 |
YORK INTERNATIONAL |
FORM 115.20-NOM4 (105)
Material in this shipment has been inspected at the factory and released to the transportation agency in goodcondition.Whenreceived,avisualinspectionof allcartonsshouldbemadeimmediately.Anyevidence ofroughhandlingorapparentdamageshouldbenoted on the delivery receipt and the material inspected in the presence of the carrier’s representative.
If damage is found, a claim should be filed against the carrier immediately.
If the equipment is not to be immediately installed, store it in a dry location with the motor protected against moisture, dust, corrosion and physical damage.
The YMB Series 2-pipe fan coil comes with a 4-row cooling / heating coil and a 120V multi-speed motor.
TheYMBE Series 240V, 2-pipe fan coil comes with a 4 row-cooling coil, 240V multi-speed motor, 240/24 transformer, and up to 25kWof factory installed electricheat. Models withmorethan10kWalsoincludea circuit breaker for branch circuit protection. Control voltage is 24V.
The YMBE Series fan coil comes with a 4-row cooling coil, 277V multi-speed motor, and up to 10kW of factory installed heat. A unit mounted disconnect is standard.
TheYMB-HWSeries 4-pipe fan coil includes a 4 row cooling coil, a 2, 3, or 4 row heating coil installed in the reheat position, and a 120V multi-speed motor.
Thesefancoilunitsarefactoryassembledforhorizontalleftsidedownapplicationwithoutanymodification required. To convert to horizontal right side down, remove horizontal drain pan andA-coil assembly, flip horizontal drain pan over to right side and reinstall horizontal drain pan and A-coil into cabinet. Secure forward edge of horizontal drain pan with angle bracket. The unit should be leveled in such a way that there is slope toward the condensate drain nipple to assure positive drainage.
All wiring must comply with the local and national code requirements. Units are provided with wiring diagrams and nameplate data to provide information required for necessary field wiring. All wiring must comply with local and national code requirements.
Any devices such as fan switches or thermostats that have been furnished by the factory for field installation must be wired in strict accordance with the wiring diagram that is supplied with the unit. Failure to do so could result in damage or injury.
Fan coil units with 10kW or less electric heat are provided with a terminal block for connection of one electrical service. Units with 15 kW and 20kW are providedwithdual circuitbreakers for theconnection oftwoelectricalservicesandunitswith25kWareprovided with three circuit breakers for the connection of three separate electrical services (see Figure 2 & 3).
Theseunitsmaybeprovidedwithaclass2transformer for24-voltcontrolcircuits. Shouldanyadd-onequip- ment also have a class 2 transformer furnished, care must be taken to prevent interconnecting outputs of the two transformers by using a thermostat with isolating contacts.
YORK INTERNATIONAL |
3 |