MKS 247D - Power Requirements; Mounting Instructions

Setup Cha
p
ter Two: Installation
26
Power Requirements
The power requirements for the 247 unit are:
•
115 VAC Setting 100 to 120 VAC nominal, 50/60 Hz
•
230 VAC Setting 200 to 240 VAC nominal, 50/60 Hz
The power consumption for the 247 unit is:
•
19 VA @ 115 VAC 60 Hz with
no
MFCs attached
•
Additional 15 VA for start-up
•
Additional 10 VA operational for
each
MFC attached
Mounting Instructions
247 Unit
The 247 unit can be used as a bench top instrument, or can be mounted through a panel or in a
standard 19” rack. However the unit is mounted, leave adequate space around it for proper
ventilation. Refer to
Dimensions
, page 24, for dimensional drawings of the 247 unit.
Note
1. When used with three or more MFCs, the 247 unit ma
y
become
q
uite
warm to the touch, especially when used with higher than nominal
(115 VAC) line voltage.
2. An extra power supply is needed if using more than two 1559 MFCs
with one 247 unit.
MFCs
Caution
Install the MFCs in the gas stream so that the flow direction corresponds
to the flow marking on the base of the equipment.
Allow enough space for connector clearance, access to zero adjustments, and access to the seat
adjustment in the control valve. This adjustment is below the external control valve on the
1259/2259 MFCs and on the top of the case on the 1159/1160 MFCs.
Refer to the appropriate instruction manual as needed for complete installation instructions.