HEAT DISSIPATION DETAILS
DESCRIPTION
ROOM
MAX W
MAX BTU
Magnet (MAG) and Patient Table (PT)
Magnet Room
2400
8189
Blower Box (MG6)
Magnet Room
1000
3415
Magnet Monitor (MON)
Control/Equipment Room
60
205
System Cabinet (SC)
Control/Equipment Room
5000
17000
Operator Workspace with LCD Color Display (GOC)
Control/Equipment Room
1450
4947
Water Chiller for BRM (4kW LCS) (WC1)
Control/Equipment Room
1670
5695
Water Chiller for SC (8kW LCS) (WC2)
Control/Equipment Room
1670
5695
Shield/Cryo Cooler Compressor - Water Cooled (CRY)
Control/Equipment Room
500
1706
Options
GE pre-engineered Main Disconnect Panel (MDP)
Control/Equipment Room
264
900
Magnetic Resonance Elastography (MRE)
Equipment Room
200
682
TEMPERATURE AND HUMIDITY SPECIFICATIONS
IN-USE CONDITIONS
NOTE
In case of using air conditioning systems that have a risk of water leakage it is recommended not to install it above
electric equipment or to take measures to protect the equipment from dropping water.
AIR RENEWAL
According to local standards.
AREA
Temperature
Humidity
Maximum
Room Gradient
Range
Change /Hr
Range %
Change %
EQUIPMENT ROOM at Inlet
15-28 *
59-82.4 *
3
5
30-75 *
5
3**
5**
MAGNET ROOM
15-21
59-69.8
3
5
30-60 *
5
3
5
CONTROL ROOM
15-32
59-89.6
3
5
30-75 *
5
3
5
OUTDOOR (11kw Chiller)
-30-43
-22-110
-
-
5-100
-
-
-
NOTE
** Room temperature gradient specification applies from floor to height of top discharge of equipment cabinets.
The altitude is from 30.5 m [100 ft] below sea level to 2438 m [7992 ft] above sea level.
MAGNET ROOM EXHAUST FAN SCHEMATIC
Vent to outside
environment
Exhaust Fan
To Facility
Air Handler
AC Power (rated as required
for operation of Motorized
Damper and Exhaust Fan)
Ground secondary of low
voltage transformer to RF
Room Common Ground Stud
RF Shield
Dielectric Isolator
Room ceiling
Motorized Damper
Exhaust Intake Vent
MAGNET ROOM
CONTROL ROOM
RF Filter
ON/OFF
Manual
fan switches in
parallel
Ductwork
Ductwork
MAGNET ROOM VENTING REQUIREMENTS
HVAC VENT REQUIREMENTS
HVAC vendor must comply with Magnet room temperature and humidity specifications and RF shielding specifications.
RF Shield vendor must install open pipe or honeycomb HVAC waveguides.
All serviceable parts in the Magnet room (e.g.: diffusers) must be non-magnetic.
Waveguides must be nonmagnetic and electrically isolated.
Incoming air must contain at least 5% air from outside the Magnet room (inside or outside the facility) to displace
residual helium.
EMERGENCY VENT REQUIREMENT
Exhaust vent system is supplied by the customer.
All items within the RF enclosure must be non-magnetic.
The exhaust vent system must be tested and operational before the magnet is installed.
The exhaust intake vent must be located near the magnet cryogenic vent at the highest point on the finished or drop
ceiling.
The Magnet room exhaust fan and exhaust intake vent must have a capacity of at least 1200 CFM (
) with a
minimum of 12 room air exchanges per hour.
The exhaust fan must be placed above RF shielding located outside 10 gauss (1mT) and with appropriate waveguide.
The system must have a manual exhaust fan switch near the Operator Workspace and in the Magnet room near the
door (the switches must be connected in parallel).
All system components must be accessible for customer inspection, cleaning and maintenance
PRESSURE VENT REQUIREMENT
A pressure equalizing vent is required in the magnet room ceiling or in the wall, at the highest point possible.
The vent minimum size must be (610 mm x 610 mm [24 in x 24 in]) or equivalent.
The pressure equalization vent must be located so any Helium gas is not vented into occupied areas.
Note: Location may affect acoustic noise transmission into occupied spaces.
Date
Rev
/24
EN-MRI-TYP-SIGNA_EXPLORER-WEB.DWG
A
03/Aug/2018
SIGNA EXPLORER /SIGNA CREATOR
Typical
M2 - HVAC-Venting
15
