WaterFurnace Series NXW - Manual (Page 38)

38
ENVISION 2 NKW 50Hz REVERSIBLE CHILLER INSTALLATION MANUAL
Unit Heat Exchanger Maintenance
1. Keep all air out of the water or antifreeze solution.
2. Keep the system under pressure at all times. Closed
loop systems must have positive static pressure or air
vents may draw air into the system.
NOTES: If the installation is in an area with a known high
mineral content in the water, it is best to establish with
the owner a periodic maintenance schedule for checking
the water-to-refrigerant heat exchanger on a regular
basis. Should periodic cleaning be necessary, use standard
cleaning procedures. Generally, the more water flowing
through the unit, the less chance there is for scaling. Low
GPM flow rates produce higher temperatures through the
heat exchanger. To avoid excessive pressure drop and the
possibility of metal erosion, do not exceed flow rate as
shown on the specification sheets for each unit.
Preventive Maintenance
Replacement Procedures
When contacting the company for service or replacement
parts, refer to the model number and serial number of the
unit as stamped on the serial plate attached to the unit.
If replacement parts are required, mention the date of
installation of the unit and the date of failure, along with an
explanation of the malfunctions and a description of the
replacement parts required.
In-Warranty Material Return
Material may not be returned except by permission
of authorized warranty personnel. Contact your local
distributor for warranty return authorization and assistance.
Replacement Fuse Chart
Model
Size
Line
Voltage/
Frequency/
Phase
Disconnect Fuse (if applicable) Branch Circuit Fuse Transformer Primary Fuse
Size
(A)
Type Part #
Size
(A)
Type Part #
Size
(A)
Type Part #
150 380-420/50/3 100 Class J, Blade 19P605-09 50 Cube* 19P602-08 0.6 Class CC 19P600-01
90 380-420/50/3 60 Class J, Round 19P605-06 35 Cube* 19P602-05 0.6 Class CC 19P600-01
60 380-420/50/3 45 Class J, Round 19P605-05 25 Cube* 19P602-03 0.6 Class CC 19P600-01
45 380-420/50/3 30 Class J, Round 19P605-03 20 Cube* 19P602-02 0.6 Class CC 19P600-01
30 380-420/50/3 30 Class J, Round 19P605-03 20 Cube* 19P602-02 0.6 Class CC 19P600-01
* Meets Class J requirements