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Фрагмент инструкции
The ideal location for the fill is at the expansion tank. 7) Automatic Air Vent (Required) - At least one automatic air vent is required. Manual vents will usually be required in other parts of the system to remove air during initial fill. 8) Manual Reset High Limit (Required by some codes) - This control is required by ASME CSD-1 and some other codes. Install the high limit in the boiler supply piping just above the boiler with no intervening valves. Set the manual reset high limit to 200°F. Wire the limit per Figures 9.1 & 9.2 in the Wiring section. 9) Flow Control Valve (Required) - The flow control valve prevents flow through the system unless the circulator is operating. Flow control valves are used to prevent gravity circulation or “ghost flows” in circulator zone systems through zones that are not calling for heat. 10) Isolation Valves (Recommended) - Isolation valves are useful when the boiler must be drained, as they will eliminate having to drain and refill the entire system. 11) Drain Valve (Required) - The drain valve is installed on the return tee located in the lower vestibule compartment as shown in Figure 8.2. 12) Low Water Cut-off (Required) - The low water cut-off supplied with this boiler must not be removed. D. Piping for Special Situations 1) Systems containing oxygen - Many hydronic systems contain enough dissolved oxygen to cause severe corrosion damage to an aluminum boiler such as the CHG. Some examples include: • Radiant systems that employ tubing without an oxygen barrier. • Systems with routine additions of fresh water. • Systems which are open to the atmosphere. If the boiler is to be used in such a system, it must be separated from the oxygenated water being heated with a heat exchanger as shown in Figure 8.13. Consult the heat exchanger manufacturer for proper heat exchanger sizing as well as flow and temperature requirements. All components on the oxygenated side of the heat exchanger, such as the pump and expansion tank, must be designed for use in oxygenated water. 2) Piping with a Chiller - If the boiler is used in conjunction with a chiller, pipe the boiler and chiller in parallel as shown in Figure 8.14. Use isolation valves to prevent chilled water from entering the boiler. 3) Air Handlers - Where the boiler is connected to air handlers through which refrigerated air passes, use flow control valves in the boiler piping or other automatic means to prevent gravity circulation during the cooling cycle. 33 To Oxygenated System From Oxygenated System 1 Bimini Boiler 2 Indirect IWH Water Heater (If Used) 3 Isolation Valve 4 Swing Check Valve 5 Central Heating Secondary Circulator 6 IWH Circulator 7 Central Heating Primary Circulator 8 Plate Heat Exchanger 9 Air Separator 10 Automatic Air Vent 11 Expansion Tank 12 Automatic Fill Valve 13 Cold Water Line 14 Relief Valve 15 Relief Valve Discharge Piping 16 Drain Valve 17 Primary / Secondary Connection Figure 8.13: isolation of the Boiler From Oxygenated Water with a Plate Heat Exchanger Figure 8.14: Chiller Piping 34 x Wiring WARNING ALL WIRING AND GROUNDING MUST BE DONE IN ACCORDANCE WITH the authority having jurisdiction or, in the absence of such requirements, WITH THE national ELECTRICAL code (ANSI/NFPA 70). 1) Line Voltage (120 VAC) Connections (Fig 9.1) - The line voltage connections are located in the junction box on the right side of the vestibule: • Black - Line voltage “hot” • White - “Neutral” for boiler and circulators • Red - “Heating” circulator “hot” • Blue - “Indirect Water Heater “ circulator “hot” • Green - Ground connection 2) Maximum circulator continuous current draw is 2A. When Piping Method #1 is used, it may be desirable to use the boiler to directly control the primary circulator in addition to the secondary circulator. If this is done, control both heating circulators using a relay with a 120VAC coil, such as a Honeywell R4222, as shown in Figure 9.3. Select a relay with a contact rating in excess of the combined draw of the two circulators. 3) Low Voltage Connections (Fig 9.1) - These connections are screw terminals located on the terminal strip next to the junction box on the left: Terminals 1 and 2 - “Heating” thermostat connections Terminals 3 and 4 - “External Limit Control” connections Terminals 5 and 6 - “Outdoor Reset Sensor” connections Terminals 7 and 8 - “Domestic Indirect Water Heater” thermostat connections Terminal 9 - “Flame Signal Reading” Heat anticipator setting for the thermostat connection is 0.1 A when thermostat is connected directly to terminals 1 and 2. CAUTION WHEN MAKING Low VoLTAGE CoNNECTIoNS, MAKE SuRE THAT No EXTERNAL POWER SOURCE IS PRESENT IN THE THERMOSTAT OR LIMIT circuits. if such a power source is present, it could destroy the boiler’s microprocessor control (MCBA). one example OF AN EXTERNAL POWER SOURCE THAT COULD BE INADVERTENTLY CONNECTED TO THE LOW VOLTAGE CONNECTIONS IS A TRANSFORMER IN OLD THERMOSTAT WIRIN...
Эта инструкция также подходит к моделям:Водонагреватели - CHG CHG150 (5.5 mb)