Weil-McLain SlimFit 2 Series Manual page 58

SlimFit Series 2
®
Field wiring
(see Figure 52 & Figure 53)
K. 0–10 VDC Remote MODULATION input –
Terminal Block P15 #5 & #6 (SlimFit control module, left side)
Using an external multiple boiler controller
tion using an external controller only works with each boiler
set up as a SINGLE boiler in the SlimFit Control setup.
1. See illustration at right and Figure 52, page 48 for details.
2. This illustration also shows how to connect TT or end switch contacts at
INPUT 2 and INPUT 3 for other uses.
3. This function can only be used with a single boiler, NOT for a boiler in a
network.
4. Note that using 0–10VDC input replaces INPUT 1 to generate a heat demand
as shown at right.
5. Remote modulation requires a 0–10VDC input signal at P15-5/6 as shown
at right.
a. The 0–10VDC input positive connection must be at terminal 6 and com-
mon connection at terminal 5.
6. Control setup:
a. Many options are available for configuring the control. The following is a
suggested setup that uses factory default settings as much as possible.
b. If DHW is required, use PRIORITY 1 to minimize setup steps.
• Connect the DHW aquastat to INPUT 2 or INPUT 3 and assign the
input used to PRIORITY 1.
• Verify that control settings are suitable for the application, changing
if necessary.
c. Use PRIORITY 2 for the system to be remote modulated.
• The factory default settings for this priority are best suited for space
heating.
• Assign INPUT 1 to the priority chosen. Accept all defaults for INPUT 1
— no changes should be necessary during the WIZARD.
• After the WIZARD has been completed, go to the ASSIGN INPUTS
menu for INPUT 1. Change SOURCE to 0–10V (default setting is TT1).
See page 71 for ASSIGN INPUTS menu information.
7. Operation:
a. A heat demand is activated at 0.9VDC and turns off at 0.8VDC. 2 VDC =
17% input. 10 VDC = 100% input. These voltage settings are not adjust-
able.
b. OUTPUT 1 (120 VAC) is activated and deactivated as the heat demand is
turned on and off. This output is a good choice to operate the system pump.
8. NOTE: The SlimFit control can be configured to use either 0–10VDC for target
operation (see previous section) or modulation, but not both.
58
commercial condensing gas
— Boiler Manual
-
fired water boiler
(continued)
OPTIONAL
— Remote modula-
See Figure 52, page 48 for details
Part number 550-100-561/0224