Assessments - 3, GPA: 4
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The heater must be placed in a suitable room on a non-combustible floor or on a non-combustible base and in an area where leakage from heat exchanger or water connections will not result in damage to the area adjacent to the heater or the structure. When such locations cannot be avoided, it is recommended that a suitable drain pan with adequate drainage, be installed under the heater. The pan must not restrict air flow. Rev. E 11-5-07 Installations in basements, garages, or underground structures where flammable liquids may be stored must have the heater elevated 18 inches from the floor using a non-combustible base. The following minimum clearances from combustible materials must be provided. Side Front Back Top Water Connection 18 in. 24 in. Remaining 6 in. 6 in. Ceiling Clearance 36 in.* *To ceiling or roof. ............Height above any roof surface within 10 ft. horizontally Vent Cap Ridge Chimney 3 ft. min. 2 ft. min. 10 ft. Roof Jack More Than10 ft. Figure 15. Figure 16. * Rise Air Supply Gas Combustion Air Supply Ventilation Vent Cap and Riser Furnished by Installer * 1” Rise Per Foot Recommended P/N 472128 P/N 472128 Rev. E 11-5-07 16 SHEET METAL BLOCKS HOLLOW MASONARY BLOCKS, NOT LESS THAN 4" THICK (LAID WITH ENDS UNSEALED AND JOINTS MATCHED FOR AIR CIRCULATION). COVER BLOCKS WITH 24 GA. (MIN.) GALVANIZED SHEET METAL. HIGHPERFORMANCEHEATER 6" Min. 6" Min. TM BASE FOR USE ON COMBUSTIBLE FLOORS HOT SPATEMP HOT POOLTEMP COLD OFF SPA POOL THERMOSTATSELECT HOT COLD All Air From Outside Model Air for Combustion Sq. In. Air Ventilation Sq. In. 150 37 37 200 50 50 250 63 63 300 77 77 350 90 90 400 100 100 Table 13. Table 12. Model Draft Hood Product No. Vent Dia. 150 DH15 460227 6 in. 200 DH20 460228 7 in. 250 DH25 460230 7 in. 300 DH30 460231 8 in. 350 DH35 460233 9 in. 400 DH40 460234 10 in. Table 14. All Air From Inside Model Air for Combustion Sq. In. Air Ventilation Sq. In. 150 150 150 200 200 200 250 250 250 300 300 300 350 350 350 400 400 400 Figure 17. CAUTION Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive chemical fumes which can void the warranty. NOTE The heater requires two uninterrupted air supply openings; one for ventilation and one to supply oxygen for proper gas combustion. The air supply openings should be sized according to Tables 12. and 13. Air supply requirements below apply to all MiniMax® heaters All opening sizes are minimum and unobstructed. INSTALLATION ON FLOORS CONSTRUCTED OF COMBUSTIBLE MATERIALS The heater may be placed on a “combustible floor” using either of the two methods listed below: a) Use a Non-combustible Base Kit for use on combustible floors. b) Construct a non-combustible base from masonry blocks as illustrated, see Figure 17. Installation (contd.) STACK TYPE INDOOR DRAFT HOOD KIT The proper draft hood and adapter must be installed on the heater as shown below: Screw (2 PLC's) HEATER Top Cover Adaptor Draft Hood INDOOR DRAFT HOOD INSTALLATION 1. Take out the louvered outer top piece after first removing the sheet metal screws, attaching it to the cabinet. 2. Install the adaptor (vent kit). 3. Install the top cover (vent kit). 4. Install the draft hood (vent kit). Use the provided screws to secure the vent assembly. Figure 18. 17 Installation (contd.) ELECTRICAL MiniMax® CH Millivolt Wiring Diagram MINIMAX® WIRING DIAGRAM (MILLIVOLT) DUAL THERM (HONEYWELL ELECTRONIC) IF ORIGINAL FACTORY WIRING MUST BE REPLACED, INSTALLER MUST SUPPLY UL OR CSA (IF CANADA) APPROVED WIRE, 18 GAUGE, 600V, 105 C° TEMPERATURE RATING. THERMAL FUSE WIRING MUST BE REPLACED WITH UL OR CSA (IF CANADA) APPROVED WIRE, 18 GAUGE, 600V, 125 C° TEMPERATURE RATING. INTERCONNECTING WIRING TO APPLIANCE MUST CONFORM TO THE NATIONAL ELECTRICAL CODE OR SUPERCEDING LOCAL (WIRING) CODES. WHT GAS VALVE ORN WHT HI-LIMIT OFF SPA WHT WHT SHUT-OFF SAFETY SWITCH PRESS WHT POOL PILOT GENERATORTH PP TH/PP POT 1 THERMOSTAT BOARD POT 2TH/PPPP POT SENSOR SEN TH WHT WHT RED THERMAL CUT-OFF Figure 19. NOTE: When connecting a remote control to the MiniMax® CH, you must install the low voltage thermostat wires in separate conduit from ANY line voltage wires. Failure to follow these instructions will cause the thermostat relay to react erratically. Rev. E 11-5-07 P/N 472128 Troubleshooting - General Troubleshooting - General 18 Possible Cause Remedy Heater will not come on Pump not running Place pump in operation Pump air locked Check for leaks Filter dirty Clean filter Pump strainer clogged Clean strainer Defective wiring or connection Repair or replace wires Defective pressure switch Replace switch Defective gas controls Call serviceperson On-Off switch in "OFF" position Turn switch to "ON" Heater Short Cycling (Rapid On and Off Operation) Insufficient water flow Clean filter and pump strainer Defective wiring Repair or replace wiring Defective flow valve or out of adjustment Call serviceperson Defective hi-limit and/or thermostat Call serviceperson Heater Ma...