Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Summary of Contents for SPX Cooling Technologies 92-1322C
- Page 1 Marley Electric Basin Heater User Manual 92-1322C...
-
Page 3: Receiving And Inspection
/ Receiving and Inspection / The heater package is shipped directly from the vendor. 1. Check all parts for any damage in transit. The carrier is responsible for the condition of the heater package upon arrival. If damage is appar- ent, note the freight bill accordingly. - Page 4 Warning Caution Note / Introduction / The purpose of a basin heater is to prevent water freezing in the cooling tower basin during periods of shutdown or standby operation. The heater system is sized according to tower model and location to give maximum protection against water freezing in the cold water basin.
-
Page 5: Installation
Note Caution Table 1 Table 2 / Installation / For detailed information concerning installation, refer to the heater installation drawing provided with the cooling tower. Heater Element Install the heater element(s) in the depressed area of the cold water basin near the outlet. -
Page 6: Control Panel
/ Installation / Control Panel The control panel is suitable for outdoor mounting, and may be mounted on the tower, but not inside the tower. Wire the heaters to the panel. Wire the panel to the branch circuit supplying power to the heater. The field supplied branch circuit disconnect switch and the branch circuit protective device (fusing or circuit breaker) shall be sized in accordance with the NEC/CEC rules for actual load. - Page 7 / Installation / Temperature / Water Level Sensor Assembly This basin heater package is equipped with a combination tempera- Warning ture/liquid level sensor and may have a thermal cutoff switch. Both are safety devices that must not be altered or changed in any man- ner.
-
Page 8: Operation
Figure 1 Table 3 Caution / Operation / Operating Instructions To operate the heater system, visually check that the water level is above the sensor probe before energizing the power supply. The temperature control is preset at 45°F. The system will not energize unless the water level is above the sensor probe and the temperature of the water is below the 45°... - Page 9 Figure 2 / Operation / Testing above Freezing Temperatures Under normal operating conditions the heaters will be turned on at a water temperature between 40° and 45°F, and turned off when the water temperature exceeds 45°F. For testing the system at temperatures above 45°F there are two methods as follows: Method A 1.
- Page 10 / Operation / Method B 1. Disconnect power to the heater control panel using standard lockout procedures for safety. 2. Drain basin until the water level is below the probe allowing removal of the probe. Make sure water still covers the heater elements. 3.
- Page 11 Figure 3 Caution / Operation / Deicing If the temperature/water level sensor assembly becomes encased in ice the heaters will not operate. Ice provides inadequate conductivity for the sensor probe to detect operational water level. To operate heaters in this situation and melt the ice follow these procedures.
-
Page 12: Troubleshooting
Caution Caution / Troubleshooting / Please refer to the Caution statement on Page 6 and the Warning statement on Page 7 of this manual before performing the following Troubleshooting procedures. If the system fails to operate, check the following: 1. Check water temperature. Systems will turn on between 40° and 45°F and turn off above 45°F. - Page 13 Table 4 / Troubleshooting / 2. If the contactor does not operate, check voltage across terminal N on the circuit board and NO on the relay mounted on the circuit board —21-29 volt required. If voltage is present across the coil—N to NO— the contactor coil is defective and the contactor must be replaced.
-
Page 14: Parts List
/ Parts List / GREEN Replacement Parts Transformer 120V/24V ... B52465D Transformer 208V/24V ... A79270D Transformer 240V/24V ... B91566D Transformer 480V/24V ... B09608D Transformer 600V/24V ... B62553D Contactor 50 amp, 600V, 24 volt coil ... C32328D Solid State Relay Card ... A79269D Sensor Probe with 12' cord ... - Page 16 7401 WEST 129 STREET OVERLAND PARK, KANSAS 66213 UNITED STATES 913 664 7400 spxcooling@spx.com In the interest of technological progress, all products are subject to design and/or material change without notice. ©2008 SPX Cooling Technologies, Inc. | Printed in USA Manual 92-1322C...