York YMB User Manual

L23954Y 1-05
INSTALLATION, OPERATION, & MAINTENANCE
FAN COIL
AIR CONDITIONERS
NEW RELEASE
Form 115.20-NOM4 (105)
***** 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.
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).
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)
LD07966
00781VIP
(See page 3 for details)

York YMB Specifications

General

Phase	1
Refrigerant	R410A
Voltage	208/230V
Dimensions (Outdoor Unit)	Varies by model
Weight (Outdoor Unit)	Vary by model

Summary

INSTALLATION

RECEIVING

Inspection of material upon arrival, noting any damage.

DESCRIPTION

Details on the YMB, YMBE, and YMB-HW fan coil unit features.

HORIZONTAL APPLICATION

Instructions for converting units for horizontal left/right side down airflow.

WIRING

Guidelines for complying with wiring codes and using diagrams.

YMBE SERIES

Specific wiring and transformer details for YMBE units.

PIPING

Requirements for sizing, insulating, and installing supply/return piping.

PIPING PRECAUTIONS

Steps to follow during soldering and pipe connection to prevent damage.

DRAIN PIPING

Installation requirements for condensate drain lines, including trap.

FAN COILS START-UP CHECKLIST

INSTALL CHECKLIST

Items to verify before starting the unit installation.

CONTROLS CHECKLIST

Verification steps for electrical supply, grounding, and controls.

Fan INSPECTION

Checks for fan, motor, bearings, and connections for proper operation.

MAINTENANCE

FILTERS

Guidelines for regular cleaning or replacement of air filters.

COIL

Methods for cleaning the unit's cooling and heating coils.