Lochinvar CF-CH(E)-i&s-08, 999 - 750, 399 Water Treatment, Terminal Strip Connection Options

Hydronic Heating Boilers and Domestic Water Heaters

INSTALLATION Continued

Set the control set point(s) to the desired operating water temperature. Observe the boiler discharge temperature after each set point adjustment to ensure proper operation.

See Programming Temperature Control, page 43 for complete programming information.

WATER TREATMENT

In hard water areas, water treatment should be used to reduce the introduction of minerals to the system. Minerals in the water can collect in the heat exchanger tubes and cause noise on operation. Excessive build up of minerals in the heat exchanger can cause a non-warrantable failure.

Terminal Strip Connection Options

The scenarios shown in FIG. 42 represent typical terminal strip connection requirements. The terminal strips are located on the left side of the unit under the electrical access panel. Other applications may be accommodated, but must be addressed individually.

FIG. 42-Ashows the position of jumpers as shipped from the factory for stand-alone operation of boilers or water heaters (Modes 1 or 2). NOTE: Boilers equipped with the

Indoor/Outdoor Air Reset option should have the 3C-3NO jumper removed for proper operation.

FIG. 42-Bshows connections to the terminal strip for Remote ON/OFF control of the boiler or water heater (Modes 1 or 2). The 1C-1NO jumper must be removed when making these wiring connections. This remote ON/OFF control will provide an Enable/Disable signal to the unit and allow the unit to operate based on the stage set points, until the remote ON/OFF signal is cancelled. NOTE: Remote ON/OFF control in

Mode 3 requires the field addition of a jumper wire from 1NO to 3NO (the 3C-3NO jumper must also be removed).

FIG. 42-Cshows the connections on a boiler equipped with the I/O Air Reset option only (Mode 1) to accomplish a Domestic Hot Water (DHW) Priority Override or an Outdoor Air Lockout Override. This operation is not possible with Modes 2 or 3. The value of BOIL DSGN should be adjusted to a temperature setting that will satisfy the DHW requirements when the Priority Override or O.A. Lockout Override is activated. This figure also shows the optional Remote ON/OFF control which can be accomplished in addition to the DHW Priority Override or O.A. Lockout Override.

FIG. 42-Dshows the connections necessary to operate the unit as a 2-Stage (High/Low Fire) boiler or water heater from an Energy Management System (EMS). The electronic control MUST be set to Mode 3 for this to properly operate. The value of BOIL MAX should be adjusted to a level that will function as a high temperature stop. The actual set point temperatures are controlled by the EMS.

FIG. 42-Eshows the connections necessary to operate the unit as a 4-Stage boiler or water heater from an EMS. The electronic control MUST be set to Mode 3 for this to properly operate. The value of BOIL MAX should be adjusted to a level that will function as a high temperature stop. The actual set point temperatures are controlled by the EMS.

FIG. 42-Fshows the Continuous and Intermittent terminals. External safety devices connected to these terminals will function to protect the unit. Devices connected to the Intermittent terminals (B1 and B2) are monitored only when there is an active Call for Heat. Devices connected to the Continuous terminals (A1 and A2) are monitored continuously and will activate an alarm (if the unit is equipped with the alarm option) anytime the safety device senses an abnormal condition. An additional wire may be field installed from these safety devices to terminals A3 or B3 (as appropriate) to activate an alarm (if the unit is equipped with the alarm option).

						Remove Jumper for I/O
						Reset Operation
HeatDem1			HeatDem2
	STAGE 1	STAGE 2		STAGE 3	STAGE 4

1C 1NO 2C 2NO 3C 3NO 4C 4NO

CONTINUOUS INTERMITTENT

A1 A2 A3 B1 B2 B3

Figure 42A

STAND ALONE OPERATION

FIG. 42 Terminal Strip (A - F) Connection Options

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