Indirect Fired Water Heater Technical Specifications Installation and Maintenance Guide WARNING IMPORTANT • Before proceeding with installation and operation, read entire manual carefully. Failure to do so can cause injury or property damage. • When receiving SMART Water Heaters, any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee.
Table of Contents Product & Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Installation - Piping Temperature & Pressure (T&P) Relief Valve . . . . . . . . . . . . . . . . . .4-5 Drain Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Automatic Air Vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product & Safety Information DANGER Following terms are used to bring attention to the presence of various risk levels, or to important information concerning product life. Hot Water Can Scald! • Water temperatures over 125ºF can cause severe burns instantly or death from scalding. • Children, disabled and elderly are at highest risk of being scalded. • Never leave them unattended in or near shower, bathtub or sink. • Never allow small children to use a hot water faucet or draw their own bath.
Pre-Installation 2. The pressure of the heat transfer medium is maintained less than the normal minimum operating pressure of the potable water system Codes Compliance Water heater installation must conform with the instructions in this manual and where applicable: • local, state, provincial, and national codes, laws, regulations and ordinances. • in Canada - CAN / CGA B149.1 or B149.2 Installation Code. Exception: Steam complying with section #1 above. 3.
Pre-Installation Recommended Clearances Locating Water Heater • • This water heater is not intended for outdoor installations. • Water heater should be installed to allow adequate clearance for servicing • Keep distance between boiler and water heater to a minimum to: – reduce piping heat loss – provide minimal friction loss • Zero clearance is permissible to any side of the SMART Series water heater, but information labels may be hidden.
Installation - Piping Temperature & Pressure (T&P) Relief Valve Standard Installation • Install T&P relief valve in the Auxiliary connection located behind the air vent on the top of the water heater (Figure 1 page 8).
Installation - Piping 4. Unscrew vent cap on air vent one full turn. Leave cap unscrewed one turn for normal venting. WARNING Do not install any valve between T&P relief valve and tank connection or on T&P relief valve discharge piping. Do not plug T&P relief valve or discharge piping. Improper placement and piping of T&P relief valve can cause severe personal injury, death or substantial property damage.
Installation - Piping Vacuum Breaker Domestic Piping Installing a vacuum breaker on the domestic cold water inlet will prevent damage to the inner tank if a negative pressure is developed in the domestic supply line. See manufacturer’s instructions for application and installation of the vacuum breaker. • Union on domestic hot water outlet should be piped at a higher elevation than domestic water drain valve. This will make draining the water heater easier.
Installation - Piping • • When the water supply pressure is higher than 70 psig, it is recommended to install a pressure reducing valve on cold water supply line to prevent water loss through T&P relief valve. DANGER Failure to install automatic mixing valve where recommended will result in severe personal injury or death. If water heater will replace tankless coil in boiler, disconnect piping to coil. Allow water to drain from coil. Do not plug tankless coil.
Installation - Piping 12" min. Heat Trap Loop (Optional) 12" min. Heat Trap Loop (Optional) M 1 13 H 5 4 5 C 1 Cold Water Inlet 1 6 10 Fig. 1: Standard Installation Domestic Piping SMART Series 9 12" min. Heat Trap Loop (Optional) Recirculating Loop 3 2 5 4 1 6 1 Cold Water Inlet 10 1 5 12" min. Heat Trap Loop (Optional) 11 Fig. 2: Standard Installation Domestic Piping with Recirculation SMART Series 1. 2. 3. 4. 5. 6.
Installation - Piping Fig. 3A: Drain Tube AssemblyCommonwealth of Massachusetts 12" min. Heat Trap Loop (Optional) 12" min. Heat Trap Loop (Optional) M 1 13 C 4 5 H 6 8 1 Cold Water Inlet 10 5 11 Fig. 3B: Commonwealth of Massachusetts Domestic Piping SMART Series 1. 4. 5. 6. 8. 9 9. Drain valve 10. Thermal expansion tank (potable) 11. Dip tube - Draining per Chart 1 13.
Installation -Piping 1 3- Port Priority Valve 2 12 7 11 Cold water inlet 1 9 1 Fig. 4: SMART System Piping with 3-Port Zone Valve (Domestic Priority) 2-Port Priority Valve (normally open) 12 7 2 11 2-Port Priority Valve (normally close) Cold water inlet 1 9 1 Fig. 5: SMART System Piping with 2-Port Zone Valves (Domestic Priority) 1. Shut-off valves 2. Circulator 7. Expansion tank 9. Drain valve 11. Feed valve 12.
Installation - Piping Zone Valve 1 12 7 Zone valve 2 11 Cold water inlet 1 9 1 Fig. 6: SMART System Piping with Zone Valves (Non Domestic Priority) 3 3 2 2 Zone Circulator 2 3 1 Zone Circulator 12 7 11 1 Cold water inlet 9 1 Fig. 7: 1. 2. 3. 7. SMART System Piping with Zone Circulators Shut-off valves Circulator Flow check valve Expansion tank 9. Drain valve 11. Feed valve 12.
Installation - Piping Fig. 8: Multiple SMART Series Water Heater System Domestic Piping - Parallel T&P Relief Valve Cold Water Inlet Isolation Valve Circulator Recirculated Water Automatic Mixing Valve Hot Water Outlet Cold Water Inlet • • • • Fig. 9: Multiple SMART Series Water Heater System Domestic Piping - Series Recommended for most applications. Any one water heater tank thermostat may be utilized to control system temperature.
Installation - Piping 3 1 2 12 7 1 11 Cold water inlet 9 Fig. 10: Multiple SMART Series Water Heater System Boiler Piping Reverse Return Balanced Flow 3 1 12 7 2 11 1 Cold water inlet 9 Fig. 11: Multiple SMART Series Water Heater System Boiler Piping - Manifold 1. 2. 3. 7. Shut-off valves Circulator Flow check valve Expansion tank 9. Drain valve 11. Feed valve 12.
Installation - Wiring Circulators Wiring Requirements • WARNING Electrical shock hazard can cause severe personal injury, death or substantial property damage. Disconnect power before installing and/or servicing. Zone Valves • • Transformer must be sized for maximum load of all zone valves. Snap Set Connection 1. All wiring must be a minimum of 18 gauge and installed in accordance with: • Priority relay must be sized for total amp draw of all circulators. U.S.A.
Installation - Wiring Fig. 13: Typical 3-wire Zone Valve Zoning, with Domestic Priority Fig. 12: Typical 4-wire Zone Valve Zoning, with Domestic Priority Transformer (Power) H 120 N V.A.C. High Voltage Transformer (Power) H 120 N V.A.C. High Voltage 24 V.A.C. 24 V.A.C.
Installation - Wiring Fig. 14: Typical 4-wire Zone Valve Zoning, without Domestic Priority Transformer (Power) Fig. 15: Typical 3-wire Zone Valve Zoning, without Domestic Priority H 120 N V.A.C. High Voltage Transformer (Power) H 120 N V.A.C. High Voltage 24 V.A.C. 24 V.A.C.
Installation - Wiring Fig. 16: Typical Circulator Zoning with Domestic Priority Honeywell R845A Relay 120 H Fig.
Installation - Wiring Fig. 18: Priority Zone Circulator Wiring Honeywell R845A Circulator Relay 120 H Thermostat zone 1 T T 2 1 VAC N Note: Maximum of 4 total circulator zone when wiring 1 zone for priority.
Water Heater Start-Up 5. When tank is full, air will stop escaping, and the automatic air vent will close. If air vent does not seat properly (water leaks out), remove cap A. Briefly push in valve B and release it to clean valve seat. Screw cap A on completely, then unscrew one turn. See Fig. 19. Filling the Inner (Domestic Water) Tank CAUTION • Never use water heater unless inner and outer tanks are completely filled with water.
Water Heater Start-Up General Notes DANGER • Household water usage patterns will affect water temperature at any faucet or shower. Occasionally check temperature at each point of use, then adjust thermostat accordingly. Always recheck temperature after adjusting thermostat. • When hot water is used in repeated small quantities, a “stacking” effect can develop in the water heater. The upper layer of water in tank can be hotter than lower layer.
Water Heater Start-up Adjusting the Water Heater Thermostat • Check water temperature at a hot water faucet immediately after first heating cycle. Further temperature adjustment may be necessary as water heating system is used. Recheck water temperature at faucet after adjustment. • When adjusting thermostat, be sure boiler limit control is set a minimum of 20ºF higher. Water heater thermostat is factory set to its lowest temperature. This may or may not be suitable for your needs.
Water Heater Maintenance Review homeowner’s maintenance responsibilities and their frequencies, including any not listed in the following section. Maintenance Schedule Annual service by qualified service technician should include the following: Any procedure required by local codes. Homeowner monthly maintenance to include: Check air vent operation. Check air vent operation. Verify system pressure. Air venting procedure may require adding water to bring system up to pressure, typically 12 psig.
Water Heater Maintenance 2. Close system supply isolation valve. WARNING 3. Connect a hose to domestic water drain valve at cold water inlet. Hose should extend to drain at floor level to allow siphoning of domestic water tank. Do not use automotive, ethylene glycol or petroleum-based antifreeze. Do not use any undiluted antifreeze. This can cause severe personal injury, death or substantial property damage. 4. Open hot water faucet at highest point above heater. 5.
Replacement Parts SMART Series 24
Replacement Parts 4 6 Thermostat Cover Plate Assembly 5 Located Below Thermostat Cover Plate Assembly 3 SMART Knob 2 Snapset Plug Thermostat Cover Plate 2 Thermostat Cover Plate Assembly 25
Water Heater Specifications Auxiliary Cold Water Inlet Hot Water Outlet Boiler Return Air Vent Cold Water Inlet Hot Water Outlet C F A Thermostat & Cover Plate Auxiliary Connection Boiler Supply B E Top View D Rear View 26
Performances 27
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