NTI S Series Installation And Operation Instructions Manual

Contents

Indirect Water Heaters Installation and Operation Instructions Trin & Stor9Boiler System PipingThe NTI Trin & Stor line of high efficiency Indirect Water Heaters are intended to be heated by an external hotwater boiler where hot water supplied from the boiler is connected to ports 4 and 5 on the indirect tank, andcirculated through an internal heat exchanger coil in the tank. See Figures 2-3 and 2-4. The tanks are specificallydesigned for low temperature applications [<100oC (210oF)] and are NOT intended to be used as a pool heatingsystem or in conjunction with steam boilers or other high temperature appliances where water temperatures couldpotentially exceed 100oC (210oF). Refer to the Installation and Operation Manual included with the boiler fordetailed instructions on connecting boiler system piping to the indirect water heater.High Temperature Applications - Trin & Stor Indirect Water Heaters are not to be usedfor high temperture applications [greater than 100oC (210oF)] or in conjunction withsteam producing systems as this will void the warranty. Failure to follow these instructions may damage the tankresulting in property damage, serious injury or death.Solar System PipingThe NTI Trin & Stor "S-SR" line of high efficiency Solar Indirect Water Heaters is intended to be heated by asolar thermal system where a propylene glycol mixture, heated by the solar collectors, is circulated through theinternal heat exchanger coil in the tank. This manual does not cover installation of solar thermal system piping. Ifinstalling a Solar Indirect Water Heater as part of an NTI Packaged Solar Domestic Hot Water System, refer tothe NTI Sol-R-Therm Manual for detailed instructions regarding Solar System Piping.Domestic side piping for solar thermal can be done in a number of configurations depending on the application.Since solar tanks are specifically designed for high temperature applications in the event of collector stagnationand overheating, tank sensors specifically designed for these high temperature applications must be used insteadof the TPI.TPI Applications - The TPI thermostat control is compatible with any Trin & Stor tank,including "S-SR" models, when used as normal indirect water heaters. The TPI is notintended for use with Solar Domestic Hot Water Systems. An alternate sensor and thermostat control, normallyprovided with the solar thermal system, should be used.Pre-heat Option - The most common application is where the solar water heater is plumbed in series with anauxiliary water heater which is used as the primary storage tank. The hot water out (connection port 2) of thesolar water heater is connected to the cold water inlet of the auxiliary water heater, so when there is a demand fordomestic hot water, the auxiliary water heater immediately brings in pre-heated water from the solar tank toreplace it instead of cold water directly from the potable water system. In this configuration the upper heatexchanger coil is not required so connection ports 4 and 5 should be capped or plugged with a brass fitting. Referto Figure 2-4 and Table 2-1 respectively for location and sizes of connection ports for applicable solar models.Back Up Option - This option is used when the solar water heater is the primary storage tank and solar waterheating alone is not enough to meet the domestic hot water demand. Hot water supplied from the boiler isconnected to ports 4 and 5 on the solar water heater and circulated through the upper heat exchanger coil in thetank. See Figure 2-4. Refer to the Installation and Operation Manual included with the boiler for detailedinstructions on connecting boiler system piping to the indirect water heater.Storage Option - This option is used when the solar water heater is the primary storage tank and is connected toan additional storage tank for use as extra storage or as a dump zone for excess heat. In this method, hot waterfrom the solar water heater is transferred to the secondary storage tank using connections 4 and 5. Note that flowdirection is reversed for this application compared to the back up option. See Figure 2-4.